RU2778724C1 - Prosthesis, reference prosthesis and method for manufacturing the prosthesis - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: group of inventions relates to medicine, namely dentistry and is intended for use in the manufacture of a reference prosthesis. A reference prosthesis to be used as a reference element of a prosthesis for the production of a prosthesis has a given shape and size. At the same time, it contains the basis of the reference prosthesis, which corresponds to the reference element of the prosthesis and contains the main part of the basis of the prosthesis to be manufactured, artificial teeth that are fixed to the basis of the reference prosthesis and serve as artificial teeth of the prosthesis to be manufactured. Moreover, the basis of the reference prosthesis is less than the prosthesis to be manufactured. The method for manufacturing the prosthesis contains the stages: (A) the stage of preparation of the reference prosthesis; (B) the stage of determining the reference prosthesis; (C) the stage of superstructure and transmission, including: (C1) the stage of superstructure and transmission in the central region; (C2) the stage of superstructure and transmission in the anterior region and (C3) the stage of superstructure and transmission in the rear area. At the same time, after completing the stage of superstructure and transmission in the central area, the stage of superstructure and transmission in the front area and the stage of superstructure and transmission in the rear area are performed simultaneously or separately.

EFFECT: inventions provide for the effective manufacture of a prosthesis tailored to a specific patient, which can be manufactured with a higher overall efficiency, also including a preliminary check and correction by grinding without reducing the fit to a specific patient.

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Description

The technical field to which the invention belongs

[0001] The present invention relates to a prosthesis, a reference prosthesis, and a method for manufacturing a prosthesis.

Prior Art

[0002] Simultaneously with the rapid aging of the population in recent years, the need for prostheses has increased. prostheses are usually custom-made to fit the shape of the patient's mouth, fine-tuned by hand.

[0003] As a technology for manufacturing a prosthesis in which the aforementioned manual work is reduced, a technology using a reference prosthesis is known (see Patent Literature 1-3). With regard to such technology, Patent Literature 1 describes "a kit for making a prosthesis, comprising a combination of a reference prosthesis base made in advance, a polymerizable resin composition to be applied to the contact surface of the prosthesis base facing the oral surface of artificial teeth, each of which has a recess to be filled with a polymerizable polymer composition on the upper portion of the tooth (occlusal surface), wherein said polymerizable polymer composition is to be filled into the recess of each of the artificial teeth." Then, in the example of Patent Literature 1, the following description is given: "In the occlusal surface of each of the available commercially available artificial teeth, cylindrical recesses of 1 to 3 mm in size were made by using a drill, to thereby create artificial teeth, each of which has a recess to add a polymerizable resin from the occlusal side.A wax denture was fabricated from a training model of a completely edentulous jaw according to the traditional method.One layer of its area that came into contact with the mucosa (the entire palatal lamellar area in the case of the upper jaw) was removed for The gingival portion of the prosthesis base was fabricated on the resulting fragment by subjecting a copolymerization polymer of methyl methacrylate and 2-ethylhexyl acrylate (75:25) to a compression press using a mold made from the original shape of the reference base. no prosthesis. Commercially available artificial teeth were placed in the anterior tooth regions and the maxillary posterior tooth regions, and artificial teeth were placed in the mandibular posterior tooth regions, each having a recess according to the present invention, thus obtaining a reference prosthesis base. In addition, as a component for the palatal portion, a product obtained by heating and softening a plate of the aforementioned copolymer having a thickness of 0.5 mm and pressing the obtained plate against a mold shaped as a palatal portion was prepared to form a molded member."

[0004] In addition, Patent Literature 2 discloses a reference prosthesis base having a specific planar shape determined based on the shape of the oral cavity of a person with teeth and a toothless person. In particular, Patent Literature 2 discloses a reference prosthesis basis having the following shape, in which the length of the segment connecting the first reference point corresponding to the left pterygomaxillary fissure of the posterior edge of the base and the left retromolar tubercle at the posterior edge of the plate, and the second reference point corresponding to the right pterygomaxillary the gap and the right retromolar tubercle, is defined as the control length, and the lengths from the set of points determined in given positions on two control segments connecting the third control point corresponding to the upper (lower) labial subzone, which corresponds to the midline of the area of the lingual border of the basis, with the first the reference point and the second reference point, respectively, up to the boundary of the basis, are set so that the ratio of said lengths to the aforementioned reference length falls within a predetermined range. In addition, Patent Literature 2 describes that artificial teeth are placed on the aforementioned reference prosthesis base to form a reference prosthesis, and after "building" a liner on the reference prosthesis base, the resulting design is worn in the oral cavity of an individual as an exemplary for correction. occlusion, in order to obtain, thus, a prosthesis corresponding to the shape of the oral cavity of an individual patient.

[0005] In addition, Patent Literature 3 discloses a template for placing a reference prosthesis. This template is used to place the reference prosthesis in the correct position, for example in the patient's mouth. The template includes a reference prosthesis holding portion for holding the reference prosthesis, and in a state in which the reference prosthesis is held in the reference prosthesis holding portion, the reference prosthesis is guided into the oral cavity or an articulator having upper and lower edentulous models fixed thereto. jaws, thus enabling the placement of the reference prosthesis. In addition, Patent Literature 3 also discloses a method for manufacturing a prosthesis, characterized in that a liner is “built on” to the side of the inner surface of the reference prosthesis, and then the shape is indicated on the “built on” liner on the reference prosthesis.

Link List

Patent Literature

[0006] PTL 1-JP 3449733 B

PTL 2-JP 6294706 B

PTL 3-WO 2018/207867 A1

Technical problem

[0007] As described above, Patent Literature 1 and 2 disclose a technology based on the concept that the mucosal-facing surface (basal surface) of a reference prosthesis base made from a prefabricated "full denture" prosthesis base is "built on " pad, and it is pressed against the patient's oral mucosa for a fit. In addition, Patent Literature 2 describes the advantage of using a reference prosthesis (base), in particular, it is described that the reference prosthesis (base) can be easily adapted to the shape of the patient's mouth simply by "adding" a gasket to the reference prosthesis (plate), and as a result, the manufacturing time of the prosthesis can be reduced. In addition, according to Patent Literature 2, the adaptability rate for a large number of patients can also be increased to, for example, 90% by forming the reference prosthesis (base) having the aforementioned specific flat shape, and the advantage of using the aforementioned reference prosthesis (base) can be obtained in in a large number of cases simply by choosing the size that matches the size of the patient's mouth.

[0008] However, as described below, it cannot be said that a method for effectively manufacturing a prosthesis corresponding to an individual patient by using a reference prosthesis base or a reference prosthesis has already been established. That is, the reference prosthesis base disclosed in Patent Literature 1 is simply manufactured by using a complete edentulous jaw training model, and there is no description relating to a specific shape thereof. In addition, in Patent Literature 1, there is no description of a detailed procedure or any similar type of method for manufacturing a prosthesis by using the aforementioned reference prosthesis basis.

[0009] In addition, Patent Literature 2 regarding the fabrication procedure prior to "adding" a liner to a reference prosthesis base or reference prosthesis simply states that a prosthesis that fits the patient's mouth is selected, and the details of this are not known. The reference prosthesis (or reference prosthesis base) is a material element for the manufacture of the prosthesis (or prosthesis base), and means a finished prosthesis-like (prosthetic base-like) element having a predetermined shape, in which the area corresponding to the prosthesis base is slightly smaller in size (in some places thinner or narrower) than the prosthesis (or prosthesis base) to be fabricated. In such a reference prosthesis (or reference prosthesis base), some dimensions (e.g., S-dimension, M-dimension, L-dimension, etc.) can be prepared so that the reference prosthesis (or reference prosthesis base) can be applied to the cavity the patient's mouth, which has a standard size. However, the number of sizes is not so great. Accordingly, even when it has been determined that the reference prosthesis (or reference prosthesis base) can be used in terms of size, there is a need to actually enable the patient to try it on and confirm its suitability.

[0010] Specifically, a simple pre-check is performed which includes placing a reference maxillary prosthesis (upper reference prosthesis) and/or a mandibular reference prosthesis (mandibular reference prosthesis) into the patient's mouth such that proper occlusal condition; and checking whether or not a site that comes into contact with the mucosa or the like in an improper manner (contact method. Hereinafter, sometimes referred to as "improper contact"), which may cause pain when wearing the prosthesis for a long period of time. In addition, in this pre-checking step, it may be found that correction by grinding is required, and in such a case, pre-correction by grinding using a hand-held grinder or the like needs to be done. Such a pre-correction requires measures against the dust generated by heavy grinding, as well as a tool, such as a hand-held grinder. In addition, depending on the grinding method used by the operator, the manufacturing time of the prosthesis is significantly increased. However, Patent Literature 2 does not particularly consider such pre-checking and correction by grinding.

[0011] The present invention has been made in view of the above circumstances, and the purpose of the present invention is to achieve at least one of the following three objects. The first object is to provide a prosthesis that includes a material element formed from the reference prosthesis as a structural element, which is expected to provide efficient manufacturing of a prosthesis tailored to a particular patient, which can be manufactured with higher overall efficiency, also including in pre-checked and corrected by grinding without reducing the fit to the individual patient.

In addition, the second goal is to provide a reference prosthesis that can be used as a material element of the prosthesis, which can significantly reduce the incidence of cases in which a preliminary check determines the need for correction by grinding.

In addition, the third object is to provide a method for manufacturing a prosthesis that enables the efficient manufacture of a prosthesis that achieves the first goal.

Solution

[0012] The present invention has been made to achieve the above objects, and according to a first aspect of the present invention, there is provided a prosthesis including a prosthesis base on which artificial teeth are fixed, said prosthesis base including a reference prosthesis base element to which artificial teeth, and a corrective element formed from a cured mass of a curable material for the basis of the prosthesis, and the corrective element is connected to the basis element of the reference prosthesis. In the state in which the prosthesis is worn in the patient's mouth, when the labial side direction is defined as "front side" in the prosthesis, the throat side direction is defined as "back side", and the side facing the alveolar mucosa in the patient's oral cavity , is defined as the "mucosal side", and when in the prosthesis host and the reference prosthesis, the surface on the side facing the mucosa is defined as the "surface facing the mucosa", the surface on the side opposite the surface facing the to the mucosa, is defined as the "polished surface", and the boundary between the mucosal-facing surface and the polished surface is defined as the "base boundary", the base of the prosthesis includes a central region having a mucosal-facing surface covering the mucosa area of the top of the alveolar ridge in the patient's oral cavity, anterior an area having a surface facing the mucosa covering the mucosa in the patient's oral cavity anterior to the alveolar ridge region, and a posterior region having a surface facing the mucosa covering the mucosa in the patient's oral cavity posterior to the region of the alveolar ridge, the element - the base of the reference prosthesis includes a central base area, an anterior base area, and a posterior base area, the corrective element includes a central corrective element that connects to the mucosal facing surface of the central base area to form a central area together with the central base area , an anterior correction element that is connected to the mucosal surface of the anterior region of the base to form an anterior region together with the basis of the anterior region, and a posterior correction element that is connected to the mucosal surface of the posterior region parts of the basis, with the formation of the rear region together with the rear region of the basis, and at least parts of the distal end regions of the boundary of the basis in the front region and the rear region are formed, respectively, from the front corrective element and the rear corrective element.

[0013] In addition, it is preferable that in the prosthesis of the above invention, 80% or more of the distal end region of the baseline in the anterior region was formed from the anterior corrector, and 80% or more of the distal end region of the basis boundary in the posterior region was formed from the posterior corrector. element.

[0014] In addition, it is preferable that in the prosthesis according to the above invention, the shape of the corrector is corrected according to the shape of the patient's mouth, and by correcting the shape in a state in which the prosthesis is worn in the oral cavity of a particular wearer, the corrector forms an occlusal surface , on which the teeth of the upper jaw and the lower jaw (in this document, these teeth are artificial teeth fixed to the prosthesis, and natural teeth, if the patient has any) come into close contact with each other, and which is a curved surface, close in shape to a plane.

[0015] In addition, it is preferable that in the prosthesis of the above invention, when at least one of the artificial teeth is determined to be a substantial artificial tooth, said essential artificial tooth is selected from the group consisting of a first premolar, a second premolar, a first molar, and canine, and when the border area of the anterior polished surface of the base of the prosthesis and the artificial tooth is defined as the "cervical line", and the area forming the pterygoid shape from the cervical line to the border of the base is defined as the "flange", and the area on the front side of the flange having the cervical line of the specified of a significant artificial tooth as the proximal end, and having a basis boundary corresponding to the specified cervical line as the distal end is defined as "the anterior portion of the flange containing the essential artificial tooth", the portion of the basis boundary of the anterior portion of the flange containing the essential artificial tooth, at least one significant artificial tooth of one or a plurality of significant artificial teeth is formed from the anterior corrector, and 5% or more and 65% or less of the polished surface of the anterior portion of the flange containing the substantial artificial tooth is formed from the anterior corrector.

[0016] In addition, it is preferable that in the prosthesis of the above invention, said prosthesis is a maxillary prosthesis, said essential artificial teeth include an artificial canine, the prosthesis base is a maxillary prosthesis base including a "lamellar palatal region", covering the palatal mucosa posterior to the region of the alveolar ridge in the patient's maxilla as a posterior region, wherein said laminar palatal region includes a "palatal lamellar correction region" formed from the posterior correction element, and at least a portion of the base boundary of the anterior flange region , containing a significant artificial tooth, which is an artificial canine, is formed from the anterior corrective element, and 10% or more and 65% or less of the polished surface of the anterior portion of the flange containing a significant artificial one is formed by the outer surface of the anterior corrective element a.

[0017] It is further preferred that, in the prosthesis of the above invention, the prosthesis is a mandibular prosthesis, the essential artificial teeth include an artificial canine, the prosthesis base is a mandibular prosthesis base including a "lingual flange portion" covering the mucosa shell of the lingual side of the alveolar process posterior to the region of the alveolar ridge on the mandible of the patient as the posterior region, the posterior flange portion includes a "lingual corrective flange portion" formed from the posterior corrective element, and at least part of the border of the basis of the anterior portion of the flange, containing a substantial artificial canine is formed from the anterior corrector, and 5% or more and 60% or less of the polished surface of the anterior portion of the flange containing the substantial artificial tooth is formed by the outer surface of the anterior corrector.

[0018] In addition, according to the second aspect of the present invention, a reference prosthesis is provided to be used as a reference prosthesis element including a reference prosthesis base element and artificial teeth in the prosthesis of the present invention.

[0019] Preferably, in the reference prosthesis of the present invention, when at least one of the artificial teeth is determined to be an essential artificial tooth, said essential artificial tooth is selected from the group consisting of a first premolar, a second premolar, a first molar, and a canine, said essential artificial teeth include an artificial canine, and when the reference prosthesis is located on a plane taken as the occlusal plane, with the side of the artificial teeth facing down, in a vertical section made on the surface along a perpendicular direction relative to the polished surface of the anterior region of the basis, which is perpendicular to the specified plane and passes through the apex of the artificial tooth, the anterior base region on the lower side 2 mm from the distal end of the base boundary of the anterior base region of the reference prosthesis has a width of 0.5 mm or more and 3 mm or less.

[0020] In addition, it is preferable that in the reference prosthesis of the present invention, the reference prosthesis is the maxillary reference prosthesis, and in vertical section, the height difference between the distal end of the base boundary of the anterior base region and the top of the artificial tooth is 13 mm or more, and 20 mm or less.

[0021] In addition, preferably in the reference prosthesis of the present invention, the reference prosthesis is the maxillary reference prosthesis, and the laminar palatal base portion has a minimum thickness of 0.5 mm or more and 3 mm or less.

[0022] Further, preferably, in the reference prosthesis of the present invention, the reference prosthesis is a mandibular reference prosthesis, and, in vertical section, the difference in height between the distal end of the base boundary of the anterior base region and the top of the artificial tooth is 13 mm or more and 18 mm or less.

[0023] According to a third aspect of the present invention, there is provided a method for manufacturing a prosthesis, comprising: (A) a reference prosthesis preparation step of preparing a reference prosthesis serving as a prosthesis reference element including a reference prosthesis base element and artificial teeth; (B) a step of determining the reference prosthesis, in which the shape of the reference prosthesis to be used is determined by (1) placing the reference prosthesis in the patient's mouth so as to place the reference prosthesis in the proper place on an imaginary occlusal plane considered as an occlusal plane located in a position in which, from a medical point of view, the specified occlusal plane is located in the patient's oral cavity, in order to thus check the state of contact between the mucous membrane in the patient's oral cavity and the reference prosthesis or (2) the installation of the reference prosthesis in an articulator having an attached to it the model of the patient's mouth, to place the reference prosthesis in the proper position on an imaginary occlusal plane, considered as an occlusal plane, located in a position in which, as it is medically assumed, the specified occlusal plane p is placed in the patient's mouth to thus check the state of contact between the patient's mouth model and the reference prosthesis, selecting, in case of improper contact during use, a reference prosthesis that has a different shape that prevents improper contact from occurring, or fine correction of the shape of the element - the basis of the reference prosthesis in the reference prosthesis to prevent the specified contact; (C) an "build on" and transfer step in which the curable prosthesis base material is "built on" in the uncured state to form a corrective element on the mucosal facing surface of the reference prosthesis base element in the reference prosthesis determined for use in the determination step of the reference prosthesis, then the reference prosthesis having a curable prosthesis base material "built on" thereon is placed in the proper position on an imaginary occlusal plane in the patient's mouth or in an articulator, and the shape of the patient's oral mucosa or the shape of the patient's mouth model is transferred to the a curable material for the base of the prosthesis and at the same time form the edge to remove excess curable material for the base of the prosthesis; and (D) a curing step in which the curable material for the base of the prosthesis is cured, which has already passed the "build-up" and transfer step. The “building on” and transfer step (C) includes: (C1) a “building on” and transferring in the central region step, in which the curable material for the base of the prosthesis in the uncured state is “built on” in the central region of the base element of the base element of the reference prosthesis and transferred the shape of the patient's mouth or the shape of the model of the patient's mouth; (C2) an anterior "building on" and transfer step in which the curable prosthesis base material is "built on" in the uncured state in the anterior area of the reference prosthesis base element base element, and the shape of the patient's mouth or the shape of the model of the patient's mouth is transmitted, and at the same time pulling the curable material for the basis of the prosthesis in the uncured state from the border of the basis with the formation of the edge; and (C3) a "building on" and transferring step in the posterior region, in which the curable prosthesis base material is "built on" in the uncured state in the posterior region of the basis element base element of the reference prosthesis, and the shape of the patient's mouth or the shape of the model of the patient's mouth is transferred and at the same time, the curable material for the base of the prosthesis is pulled out in the uncured state from the border of the base with the formation of the edge. After the "build-in" and transmission step in the center region is performed, the "build-in" and transmission step in the front region and the "build-in" and transmission step in the rear region are performed simultaneously or separately.

[0024] In addition, in the method for manufacturing a prosthesis of the present invention, preferably in the step of preparing the reference prosthesis, the reference prosthesis according to claim 7 is prepared, and the prosthesis according to claim 1 is manufactured.

[0025] In addition, preferably, the method for manufacturing a prosthesis of the present invention further includes a refinement step in which a curable material for a prosthesis base in an uncured state is added to the surface on the mucosal side of the reference prosthesis base for correcting the shape of the surface on the mucosal side of the surface after completion of the "build-up" and transfer step in the anterior region and the "build-up" and transfer step in the posterior region.

Useful results of the invention

[0026] According to the present invention, a prosthesis incorporating a material element formed from a reference prosthesis as a structural element can be manufactured with high overall efficiency, also including pre-checking and correction by grinding without compromising fit to a particular patient.

In addition, a reference prosthesis that can be used as a material element of the prosthesis can greatly reduce the incidence of cases in which the need for correction by grinding is determined at the preliminary check.

Further, in the prosthesis manufacturing method, the aforementioned prosthesis can be efficiently manufactured.

Brief description of the drawings

[0027] FIG. 1 each is a sectional view of a prosthesis according to one embodiment of the present invention. In FIG. 1A above and in FIG. 1B below illustrates an "artificial canine vertical section" of a maxillary prosthesis and a mandibular prosthesis of the full denture (full denture) type, which is a view including a canine, respectively.

Fig. 2 is a view to illustrate an image in which a maxillary prosthesis and a mandibular prosthesis according to this one embodiment of the present invention are worn by a patient.

Fig. 3 is a perspective view illustrating a reference maxillary prosthesis according to said one embodiment of the present invention.

Fig. 4 is a perspective view to illustrate a reference mandibular prosthesis according to said one embodiment of the present invention.

Fig. 5 is a side view to illustrate a state in which a patient's mouth model is attached to an articulator to be used in a method for manufacturing a prosthesis according to this one embodiment of the present invention.

Fig. 6A, 6B and 6C each is a view to illustrate the placement template to be used when the maxillary reference prosthesis and the mandibular reference prosthesis are mounted in the patient's articulator or oral cavity in a prosthesis manufacturing method according to said one embodiment of the present invention. Fig. 6A is a top view, FIG. 6B is a side view, and FIG. 6C is a rear view.

Fig. 7 is a view to illustrate a state in which the maxillary reference prosthesis and the mandibular reference prosthesis according to this one embodiment of the present invention are respectively in an occluded state.

Fig. 8 is a schematic view for illustrating a preferred three-dimensional shape of a maxillary prosthesis of the total denture (full denture) type, which is a view comprising a canine and a first molar, according to said one embodiment of the present invention, and illustrating the sectional position of _{XA -XA} ', serving as the "vertical section over the artificial canine", and the position of the section Y _A -Y _A ' serving as the "vertical section over the artificial first molar".

Fig. 9 is a diagrammatic view for illustrating a preferred three-dimensional shape of a mandibular prosthesis of the total denture (full denture) type, which is a view comprising a canine and a first molar, according to said one embodiment of the present invention, and illustrating the sectional position of XB- _{XB '} , serving as the "vertical section over the artificial canine", and the position of the section Y _B -Y _B ' serving as the "vertical section over the artificial first molar".

Fig. 10A and 10B are each schematic representations for illustrating a preferred three-dimensional form of a maxillary prosthesis of the total denture (full denture) type, which is a canine and first molar view, according to said one embodiment of the present invention. Fig. 10A on the left is an image for illustrating the difference in height between the distal end of the basal border of the anterior basal region and the apex of the maxillary canine, and the difference in height between the apex of the laminar palatine basal region and the apex of the maxillary canine in "artificial canine vertical section". Fig. 10B on the right is an image to illustrate the difference in height between the distal end of the basal boundary of the anterior basal region and the apex of the mesio-buccal cusp of the maxillary first molar and the difference in height between the apex of the lamellar palatal basal region and the apex of the mesial-buccal cusp of the first molar in "vertical section along the artificial first molar.

Fig. 11 is a schematic view for illustrating the preferred three-dimensional shape of a mandibular prosthesis of the total denture type (full denture), which is a view including a canine and a first molar according to said one embodiment of the present invention. Fig. 11A on the left is a view to illustrate the difference in height between the distal end of the baseline of the anterior base region and the apex of the mandibular canine, and the difference in height between the distal end of the baseline of the lingual area of the base flange and the apex of the mandibular canine in "artificial canine vertical section" . Fig. 11B on the right is a view to illustrate the difference in height between the distal end of the basal boundary of the anterior basal region and the apex of the mesiobuccal cusp of the maxillary first molar and the difference in height between the distal end of the basal boundary of the lingual region of the basal flange and the apex of the mesiobuccal cusp of the 1st molar in "vertical section through an artificial first molar".

Fig. 12 is a view to illustrate the shape of a reference maxillary prosthesis according to said one embodiment of the present invention in a plan view, and to illustrate the length of each portion determining a preferred flat shape based on the length of the PQ segment.

Fig. 13 is a view to illustrate the shape of a reference mandibular prosthesis according to said one embodiment of the present invention in a plan view, and to illustrate the length of each portion determining a preferred flat shape based on the length of the segment pq.

Description of Embodiments

[0028] The prosthesis of the present invention is a prosthesis that is properly manufactured by the method for manufacturing a prosthesis of the present invention, using the reference prosthesis of the present invention as a material element, and has a new previously unknown design that was not known until now. . This design, as a consequence, is also obtained by implementing such a method for manufacturing the prosthesis of the present invention. In addition, one result of the present invention is that a prosthesis can be manufactured by the method for manufacturing a prosthesis of the present invention. In addition, as the results of the method for manufacturing a prosthesis of the present invention, there are mainly the following advantageous points compared to the conventional method: "The frequency of occurrence of cases in which the need for correction by grinding is determined by pre-checking" is significantly reduced, which is not taken into account. attention in the method disclosed in Patent Literature 2; and anyone can produce a highly accurate prosthesis with satisfactory reproducibility, regardless of the skill level of the manufacturer.

[0029] First, the individual manufacturing method to be compared with respect to the above results and the method disclosed in Patent Literature 2 are described, and then an overview of the present invention is described. In addition, in the above detailed description of the present invention, for ease of understanding, the general features of the prosthesis and the reference prosthesis are first described, and then the prosthesis, the reference prosthesis, and the manufacturing method of the present invention are successively described.

[0030] 1. Existing method for manufacturing a prosthesis (custom manufacturing method)

The existing method for manufacturing a prosthesis (custom manufacturing method) generally includes the following steps 1-8.

The procedure of the existing method of manufacturing a prosthesis (custom manufacturing method): Steps

1: Taking an impression in the patient's mouth by using impression material.

2: Making a plaster model from a cast.

3: Obtaining occlusion by having the patient wear an occlusion plate.

4: Making a wax prosthesis by placing artificial teeth on an occlusal plate.

5: Allowing the patient to try on the wax prosthesis and correct the occlusion.

6: Making a mold by casting a wax prosthesis.

7: Fabrication of a prosthesis by injecting resin into a mold and curing the resin.

8: Fine adjustment of the fabricated prosthesis.

The above step 8 generally includes the following three steps.

8-1: Morphological correction

8-2: Occlusion correction and

8-3: Correction of the inner surface as required

[0031] Steps 1, 2, 3, and 5 are typically performed in a dental clinic, and steps 4, 6, and 7 are typically performed in a dental laboratory. Step 8 is in most cases performed both in the dental clinic and in the dental laboratory. The operations associated with steps 1-8, as described above, require complex and professional (skilled) skills. In addition, the operator and the work station alternate, and hence the manufacturing period is usually long.

[0032] 2. A method for manufacturing a prosthesis presented in Patent Literature 2

Here, in order to reduce the manufacturing time of the prosthesis obtained by each step as described above, there is the aforementioned technical solution disclosed in Patent Literature 2 and 3 with respect to a prosthesis using a full denture type prosthesis base in which the prosthesis base is easily standardized.

[0033] The present inventors have attempted to manufacture a prosthesis by the method using the template described in Patent Literature 3 by using the reference prosthesis described in Patent Literature 2. As a result, the present inventors have found that there is an advantage that has not been found previously, and at the same time, it became clear that there were limitations (points for improvement) that were not found in the submitted Patent Literature. First, the above advantage is described. In step 7 of the custom fabrication method, the positions of the positioned artificial teeth may shift due to the shrinkage of the resin serving as the plate material during curing, and therefore a relatively long period of time is required to complete the occlusion correction in step 8-2. In contrast, in the method of the present invention using a reference prosthesis, such positional displacement of the artificial teeth does not occur, and therefore the time needed to correct the occlusion can be significantly reduced.

[0034] This describes points for improvement. As described above, when a prosthesis is made by using a reference prosthesis, a simple preliminary check is generally performed, which includes placing the maxillary reference prosthesis and/or the mandibular reference prosthesis in the patient's mouth and checking the degree of contact with the mucosa or the like. In the technology disclosed in Patent Literature 2, verification is performed by using either of the maxillary reference prosthesis and the mandibular reference prosthesis by themselves without paying particular attention to the state of occlusion. However, it has been found that when a preliminary check is performed such that a satisfactory occlusion condition is maintained, there are a relatively large number of cases in which the need for correction by grinding is determined. In such cases in which grinding is required, pre-correction by grinding using a hand-held grinder or the like is required, but such pre-correction may lead to an increase in the manufacturing time of the prosthesis. Accordingly, as the first point to be improved, it is necessary to reduce the frequency of occurrence of such cases.

[0035] The second point to be improved is that when "building" the pad and transferring the mucosal surface in one step, it is difficult to perform high-precision transfer, and furthermore, differences in the transfer state may occur due to differences in the skills of the workers. , and the like. There is room for improvement on this item.

[0036] 3. Overview of the Present Invention Under the above circumstances, firstly, the present invention provides, as the prosthesis of the present invention, a prosthesis that can be manufactured while avoiding problems as described above.

[0037] In addition, the reference prosthesis of the present invention, in particular the reference maxillary prosthesis of the present invention and/or the reference mandibular prosthesis of the present invention, also serves as a material element forming part of the aforementioned prosthesis of the present invention. The reference prosthesis of the present invention can significantly reduce the incidence of cases in which the need for correction is determined through grinding during pre-checking, which includes the installation of a reference prosthesis in the patient's mouth or in an articulator having a model of the patient's mouth attached to it, obtained in step 2 of the custom manufacturing process.

[0038] In addition, the method for manufacturing a prosthesis of the present invention enables the efficient manufacture of a prosthesis tailored to a specific patient by performing a "build-on" step and transfer to be performed to fit the mucosal-facing surface of the reference prosthesis base element to the oral mucosa of the patient at many separate stages. That is, according to the method for manufacturing a prosthesis of the present invention, (1) fitting the mucosal-facing surface of the central portion (base center region) of the base of the reference prosthesis, and (2) fitting the mucosal-facing surface of each of the anterior portion (anterior base area) and back section (back base area), and the shaping and fitting of the edge (base border) are performed separately. With this, high-precision transmission can be easily performed, and the difference in the transmission state due to the difference in the skills of the workers and the like can be reduced.

[0039] This feature of the manufacturing method of the present invention is described in more detail. In the manufacturing method of the present invention by using the reference prosthesis of the present invention, the aforementioned correction by pre-check grinding may become unnecessary, or the grinding amount may be significantly reduced even if grinding is required.

[0040] Studies performed by the present inventors have clarified that the shape of the anterior flange (sometimes referred to as "labial lamellar wing" or "buccal lamellar wing", depending on position) is near the boundary of the base of each of the maxillary prosthesis and mandibular prosthesis, and the shape of the upper jaw prosthesis near the boundary of the basis of the palatal area varies significantly in different people. In the manufacturing method of the present invention, the number of patients for whom an adaptation in relation to the prosthesis is possible is successfully increased by using the reference prosthesis of the present invention, in which the allowable correction in each of these areas is increased.

[0041] When the shape and size of the reference prosthesis is reduced as described above, the allowable correction is increased. As a result, when positional correction using a corrective element (especially positional correction to achieve an ideal occlusal state when worn) is performed in one step, an increase in the spread caused by skill difference is inevitable.

[0042] In contrast, in the manufacturing method of the present invention, "rough" placement is performed by first fitting the mucosal surface of the central region of the base. Then, in a situation in which the wobble width is small, fitting of the mucosal surfaces of the anterior portion (anterior basal region) and the posterior portion (posterior basal region) and forming and fitting the edge (basic border) are performed. With this, anyone can perform high-precision positioning. In this case, the border with the patient's mucosa can also come into contact in a natural state by forming an edge, while replenishing (increasing) the height of the anterior portion of the reference prosthesis base flange and the length of the posterior portion of the reference prosthesis base with a curable prosthesis base material, for example, gaskets.

[0043] For this reason, by customizing according to the manufacturing method of the present invention, anyone (non-physicians as well as physicians) can effectively manufacture a patient-specific prosthesis that has satisfactory reproducibility and performance without the need for specialty training.

[0044] In this document, the prosthesis of the present invention is described after a brief description of the general features of the prosthesis and the reference prosthesis, which serves as its main structural element. These general features, in particular, basic shapes, part names, materials, methods of application, and the like, also apply to the prosthesis and reference prosthesis of the present invention.

[0045] 4. General features of the prosthesis

The term "prosthesis" (lamellar prosthesis) means a prosthetic device designed to restore the functions of the oral cavity, such as chewing, and prevent diseases caused by changes in the structure of the face, dental defects and loss of surrounding tissues in the event of loss of natural teeth and surrounding tissues, such as gums and alveolar bone. In the prosthesis, the element intended to replace missing (natural) teeth corresponds to artificial teeth, and the element intended to replace the lost surrounding tissues corresponds to the basis of the prosthesis. In this prosthesis basis, the surface that comes into contact with the alveolar mucosa (the surface that is not polished to fit the patient when the prosthesis is made) is generally referred to as the "mucosal-facing surface" (or basal surface), the surface that can come in contact with the mucous membrane of the buccal and tongue on the opposite side (the surface that is polished during the manufacture of the prosthesis) is generally called the "polished surface", and the area that serves as the border between the above surfaces is called the "basis border". In addition, the border area between the area corresponding to the gum, the basis of the prosthesis and artificial teeth, is called the "cervical line", and the area forming a wing-like shape, the cervical line of which is the proximal end, and the aforementioned border of the base serves as the distal end, is called " flange". In addition, the area of the base of the prosthesis, to which the artificial teeth are fixed, is called the "alveolar area".

In the present invention, in accordance with the above names, the surface of the prosthesis (laminar prosthesis) is divided into two surfaces: the surface in close contact with the mucosa of the alveolar process, and the surface on the opposite side, and the first is called the "surface facing the mucosa" , and the latter - "polished surface".

[0046] The prosthesis is divided into a maxillary prosthesis for the upper jaw and a mandibular prosthesis for the lower jaw. In each of the dentures, there is a full lamellar denture to be used when all teeth become defective and a partial lamellar denture to be used when some of the teeth are missing. When comparing the maxillary prosthesis and the mandibular prosthesis with each other, the prosthesis bases of both prostheses are similar in that each of the prosthesis bases has areas called "labial flange area" and "buccal flange area", which are areas that cover the mucous membrane alveolar process on the labial side and buccal side (as used herein, the direction facing the labial side and buccal side is defined as "front side") in the oral cavity of the patient. However, due to differences in the function and shape of the maxilla and mandible, the shape of the area covering the mucosa on the throat side (as used herein, the direction facing the throat side is referred to as "back side") in the oral cavity of the patient differs significantly. . That is, the posterior portion of the base of the maxillary prosthesis is a portion referred to as the "palatal flange portion" covering the mucosa of the palate of the upper jaw, and the posterior portion of the basis of the lower jaw prosthesis is a portion referred to as the "lingual flange portion" covering the mucosa of the lingual side of the alveolar process of the lower jaw. The alveolar process is located between the lingual portion of the flange and the labial portion of the flange and the buccal portion of the flange.

[0047] As a further explanation of the front flange portion, said front flange portion is divided into three regions: a left cheek flange region, a lip flange region, and a right cheek flange region according to where the region is facing. Its boundary is not necessarily strictly defined, but the labial portion of the flange is defined as the area directed from the cervical line to the boundary of the base in the region of the central incisor, lateral incisor and canine, and the left buccal (right buccal) flange is defined as the area directed from the cervical line to the boundary of the base in the area of the first premolar, second premolar, first molar and second molar on the left side (right side). However, the canine region may be included in the buccal side.

[0048] In addition, the front portion of the flange is a portion common to the base of the prosthesis of the upper jaw and the basis of the prosthesis of the lower jaw, and in general, their shape is the same. However, due to differences in the function and shape of the maxilla and mandible, the anterior portion of the flange is slightly different in shape. For example, on page 51 of the "Dental Technician's Manual Designing a Complete Denture, Designing a Full Lamellar Denture" (written by Yoshimichi Gonda et al.; Published March 1994 (published by Ishiyaku Pub, Inc.), the standard occlusal rim height is described. According to In the above literature, the height of the maxillary occlusal rim is 22 mm and the height of the lower occlusal rim is 18 mm, so the height of the occlusal rim for the lower jaw is slightly less.

[0049] As described above, in the prosthesis, each of the two - both the maxillary prosthesis and the mandibular prosthesis - are divided into two regions: an anterior region and a posterior region, and region names are usually given (such region names are also called "halved names" ). However, in the prosthesis and reference prosthesis of the present invention, the focus is on the area of the patient's oral mucosa covered by the base of the prosthesis, and this area is divided into three areas. Then the names of each of the parcels are given (such names are sometimes called "triple names"). That is, (1) the area (site) having a mucosal surface covering the mucosa of the ridge region in the oral cavity of a patient is defined as the "central area", (2) the area (site) having a mucosal surface membrane covering the patient's oral mucosa anterior to the aforementioned region of the alveolar ridge is defined as the "anterior region", and (3) an area (site) having a surface facing the mucous membrane covering the oral mucosa of the patient posterior to the above region of the alveolar crest, is defined as the "back area".

[0050] The above "central region" corresponds to a region including a partial region (included in the ridge region) posterior to the "labial flange region" and "buccal flange region", and a partial region (included in the ridge region) anterior to " palatal lamellar region" or "lingual flange region) when divided into two names. In addition, "anterior region" corresponds to the main region, with the exception of the region serving as the "central region" of each of the "labial flange region" and "buccal region In addition, the "posterior region" corresponds to the main region, with the exception of the region serving as the "central region" of the "palatal plate region" or "lingual flange region". For this reason (most of the regions overlap each other, although they do not completely correspond to friend), "posterior region" in each of the maxillary prosthesis and the mandibular prosthesis when used divided into three names and are called "palatal lamellar area" and "lingual flange area", respectively, in the same way as when using divided into two names.

[0051] As a material for the aforementioned prosthesis base, the following polymers are generally used. Namely, for example: at least one polymer based on poly(meth)acrylate is used, selected from homopolymers - methyl (meth)acrylate, ethyl (meth)acrylate, (meth)acrylate, n-propyl (meth)acrylate and butyl ( meth)acrylate or their copolymers; a polyolefin-based polymer (eg, polypropylene); a polyamide-based polymer (for example, nylon 66 (trade mark)); polyester based polymers (eg polycarbonate); polyether polymers (eg polyacetal and polysulfone); polymers based on polynitrile (for example, polyacrylonitrile); polyvinyl-based polymers (eg polyvinyl acetate); cellulose-based polymers (eg cellulose acetate); fluoride-based polymers (eg polychlorofluoroethylene); and imide-based polymers (eg, aromatic polyimide). These polymeric materials are used as only the polymeric material itself in many cases, but a filler such as an organic filler, an inorganic filler, or an organic-inorganic composite filler may also be added and used. In addition, a metallic material may be used for part of the basis of the prosthesis.

[0052] For artificial teeth to be placed and fixed to the aforementioned prosthesis base, the type and number of artificial teeth to be placed is appropriately determined in accordance with the planned design of the prosthesis. This number can be as little as one, but many artificial teeth are usually fixed. Well-known artificial teeth made of polymer or ceramic can be used as artificial teeth. Examples of an artificial tooth made from a resin include artificial teeth each containing as a material, for example, the aforementioned poly(meth)acrylate-based polymer, polyolefin-based polymer, polyamide-based polymer, polyester-based polymer, a polyether-based polymer, a polynitrile-based polymer, a polyvinyl-based polymer, a cellulose-based polymer, a fluoride-based polymer, an imide-based polymer, or a silicone-based polymer. As a method for fixing an artificial tooth, a method known in the art, such as fitting and adhesion, can be used without limitation.

[0053] 5. Main features of the reference prosthesis The term "reference prosthesis" means a commercially available prosthesis-like element to be used as a material element to facilitate the manufacture of the prosthesis, and more specifically, a prosthesis-like element in which the shape and dimensions are standardized in a predetermined manner, and which can be mass-produced in production, in a dental laboratory or the like as a product for an element that satisfies the given parameters. The term "off-the-shelf" as used in this document means that the product is available as an accessory.

[0054] The reference prosthesis includes a reference prosthesis base and artificial teeth that are fixed and held on the reference prosthesis base. When a prosthesis is made by using the reference prosthesis as a member, the artificial tooth portion of the reference prosthesis serves as the artificial tooth portion of the prosthesis, and the prosthesis base (reference prosthesis base) of the reference prosthesis forms the main prosthesis base portion. That is, the basis of the reference prosthesis serves as the basis of the prosthesis. When the reference prosthesis base is compared with the final form(s) of the aforementioned prosthesis base, a curable material for the prosthesis base, such as a liner, fills the space or gap (the space or gap is hereinafter sometimes referred to as the "reference prosthesis unequal space") formed between the surface, mucosal-facing base of the reference prosthesis and the oral mucosa of the particular patient (who is the wearer of the prosthesis), and the mucosal-facing surface and the mucosa fit together. Then, although the reference prosthesis is smaller than the prosthesis by the unfitted space of the reference prosthesis, which is also referred to as "admissible correction", the base design and shape of the reference prosthesis is the same as in the prosthesis. Accordingly, in the present invention, the reference prosthesis is considered as a prosthesis, and the mucosal-facing surface, the polished surface, and the baseline are defined. In addition, the respective areas (areas) of the reference prosthesis are called "central base area", "anterior base area" and "posterior base area", respectively, "central area", "anterior area" and "posterior area", which are divided into three names of the corresponding areas (areas) of the prosthesis.

[0055] That is, the reference prosthesis includes a reference prosthesis base and artificial teeth, wherein said reference prosthesis base includes a “central base region”, an “anterior base region”, and a “posterior base region”, and the aforementioned artificial teeth are fixed on side of the polished surface of the area extending from the "central base area" to the "front base area". The reference denture base and artificial teeth in the reference denture are not particularly different from the denture base and artificial teeth in the denture, except that the shape of the reference denture base is as described above.

[0056] The basis of the reference prosthesis can be made using various procedures, such as injection molding, compression molding, cutting and stereolithography using a three-dimensional printer. In addition, the base of the reference prosthesis and artificial teeth (dentition) can be made as a single unit. Alternatively, after the reference prosthesis base and the artificial teeth (dentition) are made separately, the artificial teeth (dentition) can be attached to the alveolar portion of the reference prosthesis base. In the first case, there is an advantage that the reference prosthesis base can be easily mass-produced by mass production, and the manufacturing cost can be significantly reduced. In the latter case, the advantage is that artificial teeth (dentition) adapted to the individual patient can be created.

[0057] In addition, in the reference prosthesis, a large number of tooth arrangements and the like are not required because it is a mass-produced reference prosthesis, and in many cases, a reference prosthesis differing only in relative dimensions (size) is prepared. In addition, in many cases a reference denture is used for a complete denture (full denture) in which all dentitions are fixed.

[0058] The reference prosthesis is generally designed in such a shape that the flat shape of the base of the reference prosthesis suits a large number of patients (serves as, let's say, the common part as in the greatest common divisor) based on a large number of clinical data and data on a large number of forms the oral cavity of a person with teeth and a toothless person (see Patent Literature 2). However, to the present inventors' knowledge, there are no instances in which the three-dimensional shape of the reference prosthesis is optimized or specified in terms of the amount of use of a curable material for the prosthesis base, such as a liner, the frequency with which, as determined by pre-checking, the need for correction is determined by polishing, and strength of the reference prosthesis.

[0059] b. prosthesis according to one embodiment of the present invention

Here, a prosthesis 1 according to one embodiment of the present invention of the type of a complete prosthesis (full prosthesis) is described with reference to FIG. 1A, fig. 1B and FIG. 2. As illustrated in FIG. 1 and FIG. 2, the prosthesis 1 (1A and 1B) has a general design in which the artificial teeth 31 (31A and 31B) or a set of artificial teeth 30 (30A and 30B) are fixed to the base of the prosthesis 2 (2A and 2B) in the same way as in conventional prosthesis.

[0060] In addition, in the same manner as in a conventional prosthesis made by using a reference prosthesis, the prosthesis 1 includes an element 5 (5A and 5B) of the reference prosthesis having artificial teeth 31 (31A and 31B) fixed to the element 4 (4A and 4B) of the reference prosthesis base, and a corrective element 6 formed from the cured mass of the curable material for the base of the prosthesis. In addition, the basis 2 (2A and 2B) of the prosthesis includes a basis element 4 (4A and 4B) of the reference prosthesis and a corrective element 6 connected to the basis element 4 (4A and 4B) of the reference prosthesis. The base element 4 (4A and 4B) of the reference prosthesis serves as a base forming the main base portion of the prosthesis 2 (2A and 2B), and in the configuration illustrated in FIG. 1 and FIG. 2, the corrective element 6 forms the remainder of the basis 2 of the prosthesis.

[0061] In addition, the base 2 (2A and 2B) of the prosthesis in this embodiment includes "central regions" 2A1 and 2B1, "anterior regions" 2A2 and 2B2, and "posterior regions" 2A3 and 2B3 when using three names in the same manner as in the related prior art prosthesis. In addition, the base element 4 (4A and 4B) of the reference prosthesis includes, respectively, "central base areas" 20A1 and 20B1, "anterior base areas" 20A2 and 20B2 and "posterior base areas" 20A3 and 20B3, as well as in the basis of the conventional reference prosthesis of the related prior art corresponding to the aforementioned relevant area. As for the numbers (reference symbols of the respective portions of the reference prosthesis base element 4 (4A and 4B), the same numbers (reference symbols) as those of the reference prosthesis 10 (see FIG. 3 and FIG. 4) according to this embodiment are used, including the basis element 4 of the reference prosthesis as the basis of the reference prosthesis, and used as the element 5 of the reference prosthesis.

[0062] The prosthesis 1 according to this embodiment has the essential feature that in all of the above areas, the basis element 4 (4A and 4B) of the reference prosthesis forms the main area 2 (2A and 2B) of the basis of the prosthesis, and the basis element 4 reference prosthesis connects to

corrective element 6 in a certain way.

[0063] Specifically, the correction element 6 has a first feature as follows. The corrective element 6 forms the rest of the central area 2A1, 2B1, with the exception of the base elements 4 (4A, 4B) of the reference prosthesis, and includes the central corrective elements 6A1 and 6B1 connected to the surfaces 23A and 23B facing the mucous membrane of the bases 20A1 and 20B1 of the central region. In addition, the corrective element 6 forms the rest of the anterior regions 2A2 and 2B2, with the exception of the base elements 4 (4A, 4B) of the reference prosthesis, and includes the anterior corrective elements 6A2 and 6B2 connected to the surfaces 23A and 23B facing the mucosa shell, front regions of bases 20A2 and 20B2. In addition, the corrective element 6 forms the remainder of the posterior regions 2A3 and 2B3, with the exception of the base element 4 (4A and 4B) of the reference prosthesis, and includes the posterior corrective elements 6A3 and 6B3 connected to the surfaces 23A and 23B facing mucous membrane, posterior region of bases 20A3 and 20B3 of the posterior region. Thus, at least portions of the mucosal surfaces 1A4 and 1B4 in the central regions 2A1 and 2B1, the anterior regions 2A2 and 2B2, and the posterior regions 2A3 and 2B3 are respectively formed from the central corrective elements 6A1 and 6B1, the anterior corrective elements elements 6A2 and 6B2 and rear corrective elements 6A3 and 6B3.

In addition, the corrective element 6 has a second feature, which is as follows. At least parts of the distal end regions on the side of the base boundaries 1A6 and 1B6 in the anterior regions 2A2 and 2B2 and the posterior regions 2A3 and 2B3 are respectively formed from the front corrective elements 6A2 and 6B2 and the rear corrective elements 6A3 and 6B3.

[0064] The center corrector 6A1 (6B1), the front corrector 6A2 (6B2), and the rear corrector 6A3 (6B3) do not always need to be provided separately from each other, but may be formed to be connected to each other for coating the entire surface facing the mucous membrane of the basis element 4A(4B) of the reference prosthesis.

[0065] Generally, in the prosthesis 1 (1A, 1B) according to this embodiment, the basis element 4 (4A, 4B) of the reference prosthesis has a standardized predetermined shape (mass production predetermined shape) or a shape that is essentially the same as the above the form. As used herein, the phrase "a shape that is substantially the same" means a shape that is slightly changed from a predetermined shape by fine correction by simple grinding or the like. In addition, the corrective member 6 has a shape corrected according to the shape of the patient's mouth so that, in a state in which the prosthesis is worn in the mouth of a particular wearer patient, the "occlusal plane" obtained by approximating the "occlusal surface" which is a curved surface on which the teeth of the maxilla and mandible (in this document, the term "teeth" means artificial teeth fixed to the prosthesis, and natural teeth, if the patient has them) come into close contact with each other, is set in a position in which, as expected from a medical point of view, the occlusal plane should be in the patient's mouth.

[0066] Since the prosthesis 1 (1A and 1B) according to this embodiment has the above structure, the prosthesis 1 has a fit comparable to that of the prosthesis obtained by the custom-made method, and the prosthesis 1 can be easily manufactured in a short time by implementing the manufacturing method according to this embodiment.

[0067] The curable material for the prosthesis base, which serves as the material for the cured mass forming the corrective element 6 in the prosthesis 1 (1A and 1B) according to this embodiment, means a polymerization-curable material that becomes the material for the aforementioned polymer prosthesis base when cured. The curable material for the base of the prosthesis contains a monomer (polymerizable monomer) serving as a starting material for the above resin material, a polymerization activator and a filler as needed, and is a material that can be plastically deformed into a paste or dough cake before curing, and can retain its appearance when not subjected to stress. The polymerization type of the curable material for the base of the prosthesis includes "photopolymerization" type, "thermal polymerization" type, "chemical polymerization" type, "microwave polymerization" type and the like depending on the type of polymerization activator used, but from the viewpoint of manufacturability, it is preferable photopolymerization type.

[0068] Considering the degree of effect, the prosthesis according to this embodiment is preferably a prosthesis in which the above-mentioned artificial teeth are one or a plurality of artificial teeth including, as a substantial artificial tooth, an artificial tooth of at least one tooth selected from the group consisting of a first premolar, a second premolar, a first molar and a canine, in particular, a prosthesis having the form in which three or more artificial teeth 31 (31A and 31B), including artificial canines 31A3 and 31B3 (see Fig. 7, fig. 10 and fig. 11) are fixed separately and/or in pairs (hereinafter sometimes referred to as "canine view"), more preferably a prosthesis having the form in which three or more artificial teeth 31 are fixed ( 31A and 31B), including an artificial canine and first molars 31A6 and 31B6 (hereinafter sometimes referred to as "a view including a canine and first molar"), in particular, preferably a complete plate prosthesis (full prosthesis).

In addition, when the boundary area of the anterior polished surface of the aforementioned base of the prosthesis having the specified artificial tooth is defined as the "cervical line", the area forming a wing-like shape from the cervical line to the border of the base is defined as the "flange", and the area on the front side of the flange, having the cervical line of a substantial artificial tooth as its proximal end, and having a base boundary corresponding to said cervical line as its distal end, is defined as "the anterior portion of the flange containing the substantial artificial tooth", it is preferable that when there is one substantial artificial tooth, the boundary portion of the basis of the front section of the flange, containing a significant artificial tooth, is formed from the front corrective element, when there are many essential artificial teeth, the boundary section of the basis of the front section of the flange, containing a significant artificial tooth, and related to at least one of a plurality of substantial artificial teeth, formed from the anterior corrector, and 5% or more and 65% or less (hereinafter, "x or more and y or less" can sometimes simply be expressed as "x-y") of the polished surface of the anterior portion of the flange , containing a significant artificial tooth, is formed from the front corrective element.

[0069] In the aforementioned form including the canine, portions having, as proximal ends, cervical lines 1A7 and 1B7 in those parts on the anterior polished surfaces 1A5 and 1B5 in which artificial canines are present, and having, as distal ends , the borders 1A6 and 1B6 of the basis, corresponding to the specified cervical lines, are defined as "anterior sections of the flange containing a significant artificial tooth." In the above form including the canine, when "anterior flange portions containing a substantial artificial tooth" for artificial canines are defined as "anterior flange portions containing a canine", it is preferred that at least portions of the basis boundaries of the anterior flange portions containing a canine, are formed from the front correction elements 6A2 and 6B2, and in addition, 5% or more and 65% or less of the polished surfaces of the "tooth-containing flange front portions" are formed from the front correction elements 6A2 and 6B2. In addition, in the aforementioned form, including the canine and molar, the areas having the cervical lines 1A7 and 1B7 of the artificial first molars 31A6 and 31B6 on the anterior polished surfaces 1A5 and 1B5 as proximal ends, and having the basis boundaries 1A6 and 1B6 corresponding to the indicated cervical lines, as distal ends, are defined as "anterior portions of the flange containing a substantial artificial tooth", referring to artificial first molars. In a view including a canine and a molar, when "anterior flange portions containing a substantial artificial tooth" referring to artificial first molars are defined as "anterior flange portions containing a first molar", it is preferable that the preferred conditions for the aforementioned view are satisfied, including the canine, the boundaries of the basis of most of the anterior flange sections containing the posterior molar are formed from the anterior corrective elements 6A2 and 6B2, and, in addition, 5% or more and 65% or less of the polished surfaces of the "anterior flange sections containing the first molar " are formed from the front corrective elements 6A2 and 6B2.

[0070] In this embodiment, features common to prostheses 1 (1A and 1B) of the upper and lower jaw are described. However, as described above, there are points of difference between the upper jaw prosthesis and the lower jaw prosthesis, and these differences are also reflected in the prosthesis according to this embodiment. That is, in the maxillary prosthesis 1A according to this embodiment, the prosthesis base 2 includes, as the aforementioned posterior region, the maxillary prosthesis base 2A, which is a lamellar palatal portion 2A3 covering the palatal mucosa of the patient's maxilla. In addition, the reference prosthesis element 5 is a maxillary reference prosthesis element 5A in which the artificial teeth 31A are fixed to the base 4A of the maxillary reference prosthesis, including, as the aforementioned posterior base region, the base plate palatal portion 20A3 forming the main portion lamellar palatal area 2A3. In addition, the palatal plate portion 2A3 includes a palatal plate correction portion 6A3 formed from the posterior correction member.

In addition, in the maxillary prosthesis 1A according to this embodiment, which has a form including a canine, preferably at least part of the boundary of the base of the "anterior portion of the flange containing the canine" is formed from the anterior corrector 6A2, and 10-65% , in particular, 10-60% or less of the polished surface of the front section of the flange containing the canine is formed from the outer surface of the front corrector 6A2.

[0071] Meanwhile, in the mandibular prosthesis 1B according to this embodiment, the prosthesis base 2 includes, as the aforementioned posterior region, the mandibular prosthesis base 2B, which is the lingual flange portion 2B3 covering the mucosal surface of the lingual side of the alveolar offshoot of the patient.

In addition, the reference prosthesis member 5 is a mandibular reference prosthesis member 5B in which the artificial teeth 31B are fixed to the mandibular reference prosthesis base 4B including, as the aforementioned back base region, a flange base lingual portion 20B3 forming a main portion lingual section 2B3 of the flange. Further, the flange tongue portion 2B3 includes a flange tongue corrector portion 6B3 formed from the rear corrector member.

In addition, in the mandibular prosthesis 1B according to this embodiment, which has a form including a canine, preferably at least part of the boundary of the base of the "anterior portion of the flange containing the canine" is formed from the anterior corrector 6B2, and 5-60% , in particular, 10-60% or less of the front section of the flange containing the canine is formed from the outer surface of the front corrector 6B2.

[0072] Herein, as illustrated in FIG. 1A, in the mucosal-facing surfaces of the maxillary reference prosthesis base 4A (maxillary reference prosthesis element 5A), the radius of curvature of the mucosal-facing surface on which the central corrector 6A1 is located is smaller than the radii of curvature of the surfaces facing to the mucous membrane, on which the anterior corrective element 6A2 and the corrective palatine plate area 6A3 are located. The radius of curvature of the part on which the central correction member 6A1 is located is small, and therefore, the positioning of the anterior correction member 6A2 and the correction palatal plate portion 6A3 when forming is facilitated. Meanwhile, due to the small radius of curvature in the case where fitting to the oral mucosal surface of the patient is performed by filling the curable prosthesis base material in the unfitted space of the aforementioned reference prosthesis, when attempting to perform this fitting with only one operation, simply applying a small force is sufficient. in order to cause the front and back of the portion to which the force is applied to wobble up and down, said portion acting as a center of rotation, and high-level craftsmanship is required to perform a high-precision fit. However, by implementing the manufacturing method of the present invention, the existence of such wobble can be suppressed while obtaining the advantage of the aforementioned ease of placement.

[0073] In addition, as illustrated in FIG. 1B, in the surfaces facing the mucous membrane of the base 4B of the reference lower jaw prosthesis (element 5B of the reference lower jaw prosthesis), the radius of curvature of the surface facing the mucous membrane, on which the central corrective element 6B1 is located, is less than the radius of curvature of the surfaces facing the mucous membrane shell, on which the front corrective element 6B2 and the lingual corrective section 6B3 of the flange are located. In addition, the basis 4B of the reference mandibular prosthesis is the same as the basis 4A of the reference maxillary prosthesis in the following points: the radius of curvature of the part on which the central correction element 6B1 is located is small, and therefore the placement when forming the anterior correction element 6B2 and the lingual correction portion 6B3 of the flange is lightened; and by implementing the manufacturing method of the present invention, the existence of wobble can be suppressed.

[0074] In the maxillary reference prosthesis base 4A (maxillary reference prosthesis element 5A), the central region 2A1 is located near the artificial tooth 31. Therefore, as is clear from the flat shape (see FIG. 12) of the maxillary reference prosthesis 10A described later, the central region 2A1 has an arcuate shape (U-shape). In addition, by arranging the curable prosthesis base material serving as at least a part of the central corrective member 6A1 in at least three parts: a central portion of the curved portion of the central region 2A1 having an arcuate shape, and other portions (including the space near both ends), usually over the entire area, even when the curable prosthesis base material serving as at least a part of the anterior corrector 6A2 and the corrective palatal plate portion 6A3 is not applied, placement is performed taking into account the shape of the patient's mouth .

[0075] 7. Reference prosthesis according to one embodiment of the present invention

The reference prosthesis according to one embodiment of the present invention is a reference prosthesis used as a member of the aforementioned reference prosthesis in a prosthesis according to one embodiment of the present invention.

[0076] FIG. 3 and FIG. 4 describes the reference prosthesis 10 (10A and 10B) according to this embodiment, which can be properly used as the reference prosthesis element 5 of the prosthesis 1 according to this embodiment. The reference prosthesis 10 (10A and 10B) has a general design in which the artificial teeth 31 or set of artificial teeth 30 are fixed to the base of the reference prosthesis 20 in the same manner as in the conventional reference prosthesis of the related art. The basis of the reference prosthesis 20 includes "central base regions" 20A1 and 20 B1, "anterior base regions" 20A2 and 20B2, and "posterior basis regions" 20A3 and 20B3 corresponding to "central regions" 2A1 and 2B1, "anterior regions" 2A2 and 2 B2 and "posterior areas" 2A3 and 2B3 in the base 2 of the prosthesis 1. Also in the reference prosthesis 10 names of areas, for example, the borders 22A and 22B of the base (lingual borders 22A1 and 22 B1 of the flange and buccal borders 22A2 and 22 B2 of the flange), surfaces mucosal-facing surfaces 23A and 23B, polished surfaces 24A and 24B, and cervical line have the same meanings as similar elements of the related prior art prosthesis and the related prior art reference prosthesis.

[0077] With regard to the flat shape of the reference prosthesis including the reference prosthesis according to this embodiment, even in the related prior art reference prosthesis, the flat shape of the reference prosthesis is optimized to fit a large number of patients, based on a large number of clinical data and data of a large number of patients. shapes of the oral cavity of people with teeth and edentulous people (see Patent Literature 2). In addition, a reference prosthesis having an appropriate size is also selected for use as a material element of a prosthesis for a patient according to the size of the patient's mouth.

[0078] As used herein, with respect to the three-dimensional shape of the reference prosthesis, the basic design concept is that, in the related prior art reference prosthesis, the aforementioned "reference prosthesis unfitted space" is retained, which is the allowable correction carried out by the curable material for the prosthesis base . However, in a specific method of maintaining the "reference prosthesis unequal space", the base thickness of the reference prosthesis is uniformly reduced as a whole (see Patent Literature 1), and the reference prosthesis is not optimized as intended.

[0079] In contrast, in the reference prosthesis according to this embodiment, the three-dimensional shape of the reference prosthesis is determined considering the width of the adaptable range of the reference prosthesis (in other words, considering how rarely the need for correction by grinding is determined in pre-checking), ease of surface correction , facing the mucosa, by using a curable material for the base of the prosthesis, the amount of consumption of the curable material for the base of the prosthesis in this case, the strength of the reference prosthesis, and the like. That is, when the shape of the base 2 of the prosthesis is determined as the base shape, the thickness of at least a portion of each of the central base region, the anterior base region, and the posterior base region is set to be significantly smaller than the thickness of each of the central region, the anterior region, and the posterior region, and moreover, the height of the base boundary of the anterior base region is set to be significantly smaller than the height of the base boundary of the reference prosthesis of the related prior art. In this way, spaces are saved in which the center corrective elements 6A1 and 6B1, the front corrective elements 6A2 and 6B2, and the rear corrective elements 6A3 and 6B3 can be connected.

The following describes in more detail the planar shape and three-dimensional shape of the reference prosthesis of the present invention.

[0080] 7-1. About the preferred flat shape

Preferably, the flat shape of the reference prosthesis of the present invention is a flat shape as described in Patent Literature 2. Such a flat shape is described herein with reference to FIG. 12 and FIG. 13. Preferred flat shape means the shape obtained as follows. The point corresponding to the left pterygomandibular fissure at the posterior edge of the maxillary reference prosthesis plate and the point corresponding to the left retromolar cusp at the posterior edge of the mandibular reference prosthesis plate are defined as the first control points: P (p) for the maxilla (mandible) ), respectively. In addition, similarly, the point corresponding to the right pterygomandibular fissure for the maxillary reference prosthesis and the point corresponding to the right retromolar cusp of the mandibular reference prosthesis are defined as the second reference points: Q (q) for the maxilla (mandible), respectively. In addition, the points corresponding to the upper (lower) labial frenulum, which correspond to the midline portion of the lingual border of the flange, are defined as the third control points: O (o) for the upper jaw (mandible), respectively. Length of segment: PQ (pq) connecting P (p) and Q

(q) is defined as the control length, and the length from the set of points defined at given positions on the two control segments OP(op) and OQ(oq) connecting the third control point to the first control point and the second control point, respectively, to the boundary basis, and the length of the segment OM (om), when the midpoint of the segment PQ (pq) is designated as M (m), is set so that the ratios of these lengths to the aforementioned control length fall within a predetermined range. The above control points and the set of points are not necessarily on the same plane. However, the difference in height relative to the length of each shape-defining line is small, and therefore, the control points and the specified set of points are considered to be located on the same plane in the present description.

In the present description, the aforementioned set of points and the distance from each of these points to the baseline (relative length standardized with reference length) are described with respect to each of the maxillary reference prosthesis and the mandibular reference prosthesis.

[0081] (1) About the maxillary reference prosthesis The corresponding points of the maxillary reference prosthesis designate three points (P1, P2 and P3 from anterior to posterior) that lie on the segment OP and which divide the segment OP into four equal parts, and three points (points Q1, Q2 and Q3 from the front side to the back side) that lie on the segment OQ and which divide the segment OQ into four equal parts. In addition, points are defined (D1, D2 and D3 as points corresponding to P1, P2 and P3, and E1, E2 and E3 as points corresponding to Q1, Q2 and Q3) at which perpendicular lines intersect the front boundary of the basis, if perpendicular lines are drawn. lines to segment OP or segment OQ, on which the indicated corresponding points lie. The distance from each of the points to the boundary of the basis means the segment connecting the corresponding points, that is, the relative length of each of the segment P1D1, the segment P2D2, the segment P3D3, the segment Q1E1, the segment Q2E2 and the segment Q3E3 with respect to the segment PQ.

[0082] The preferred flat shape of the base of the maxillary prosthesis is a shape in which the length of the segment OM is from 0.76 to 0.98, the length of each of the segment P1D1 and the segment Q1E1 is from 0.11 to 0.36, the length of each of segment P2D2 and segment Q2E2 is 0.19 to 0.45; and the length of each of segment P3D3 and segment Q3E3 is 0.16 to 0.45.

[0083] (2) About the mandibular reference prosthesis The corresponding points of the mandibular reference prosthesis are points p1, p2, p3, q1, q2, q3 and m corresponding to points P1, P2, P3, Q1, Q2, Q3 and M, which represent the corresponding points for the upper jaw. In addition, the distance from each of these points to the basis boundary includes not only the distance to the front boundary of the basis, but also the distance obtained by adding the distance to the rear boundary of the basis to the distance to the front boundary of the basis. The lengths from the indicated points to the anterior border of the basis are the p1d1 segment, the p2d2 segment and the p3d3 segment, the q1e1 segment, the q2e2 segment and the q3e3 segment, and the segment from, corresponding to the basis of the upper jaw prosthesis. In addition, the distances from the points to the rear boundary of the basis are obtained by defining points (b1, b2 and b3 as points corresponding to p1, p2 and p3, and c1, c2 and c3 as points corresponding to q1, q2 and q3), while perpendicular lines cross the rear boundary of the basis when perpendicular lines are drawn to the segment op or segment oq, on which the corresponding points lie, and determining the relative lengths relative to the segment pq of the segments connecting the intersections of the boundaries of the basis on both sides with the corresponding points, while the indicated corresponding points are located between them, that is, segment d1b1, segment d2b2, segment d3b3, segment e1c1, segment e2 c2 and segment e3c3.

[0084] The preferred flat shape of the mandibular prosthesis base is a shape in which the length of the segment from is from 0.74 to 0.94, the length of each of the segment p1d1 and the segment q1e1 is from 0.11 to 0.32, the length of each of segment p2d2 and segment q2e2 is from 0.13 to 0.34, the length of each segment p3d3 and segment q3e3 is from 0.14 to 0.33, the length of each segment d1b1 and segment e1c1 is from 0.14 to 0.40 , the length of each of the segment d2b2 and the segment e2c2 is from 0.19 to 0.41, and the length of each of the segment d3b3 and the segment e3c3 is from 0.21 to 0.42. In this case, the conditions p1b1>p1d1, e1c1>qlel, p2b2>p2d2, e2c2>q2e2, p3b3>p3d3 and e3c3>q3e3 are satisfied from the mutual arrangement of the corresponding points.

[0085] 7-2. About the preferred 3D shape

In the reference prosthesis of the present invention, based on the new finding that "under the aforementioned preliminary check, the areas where the incidence of improper contact with the patient's mucosa and the like is high are the periphery of the border of the anterior region of the base and the periphery of the border of the posterior region basis, and the latter can be optimized by a flat shape, and the former cannot be optimized by only a flat shape, found by the present inventors, the height of the front region of the basis is reduced, and its thickness is reduced to such a level that an improper contact area does not occur as much as possible.

In the present invention, the preferred ranges for such a height and width (thickness) of the front base region are determined by using the predetermined cross section described below.

[0086] 7-3. About the cross section serving as a reference for determining the preferred three-dimensional shape

In the reference prosthesis of the present invention, attention is focused on one artificial tooth, and said artificial tooth is designated as the reference artificial tooth. A particular point on the reference artificial tooth is defined as the reference point and the reference prosthesis is placed on a plane considered as the occlusal plane with the artificial tooth side facing down. In this case, the aforementioned height and width (thickness) are determined based on the shape of a vertical section (hereinafter sometimes referred to as "vertical section along the artificial tooth control"), made by a plane along a direction perpendicular to the polished surface of the anterior region of the basis, which is perpendicular to the occlusal plane and passes through the control point of the control artificial tooth. Although the details are described below, for example, the relationship between the "artificial canine vertical section" (corresponding to X _A -X _A ' section), which is the "reference artificial tooth vertical section" in the maxillary reference prosthesis, when the reference artificial tooth is artificial canine, and the polished surface of the aforementioned anterior base region, such as illustrated in FIG. 8, and the relationship between the "artificial canine vertical section" (corresponding to section XB- _{XB '} ), which is the "control artificial tooth vertical section" in the mandibular reference prosthesis, and the polished surface of the aforementioned anterior base region is illustrated in FIG. 9.

[0087] Before describing the preferred form of the aforementioned "vertical section over the control artificial tooth", the "occlusal plane" is described. First, occlusion is described. The term "occlusion" means a condition in which the upper and lower teeth are closed to each other, and the surface on which the upper and lower teeth come into contact with each other is called the "occlusal surface". In general, the natural teeth are arranged in a straight line in a downward curve (this curve is also called Spee's curve) while reflecting the shape of the jaw, and therefore the aforementioned occlusal surface also reflects the position of the natural teeth, forming a curved surface that describes relatively large arc when viewed from the side. The radius of curvature of the aforementioned curved surface serving as the occlusal surface is relatively large, and therefore can be approximated by a plane. In this case, the plane thus approximated is the "occlusal plane".

[0088] From a medical point of view, it seems to be ideal if the aforementioned "occlusal plane" is located in a position that is parallel to a plane called the "Camper's plane", which is an imaginary plane connecting the lower edge of the ala of the nose and the upper edges of the ear tragus with both sides, and which is lower by about 20 mm (usually 18-22 mm) from the junction of the nasal septum and upper lip in a direction perpendicular to the Camper plane. Also in the prosthesis, the following is common. In the state in which the prosthesis is worn in the patient's mouth, both the teeth of the upper jaw and the lower jaw (in this document, the term "teeth" means artificial teeth fixed to the prosthesis, and natural teeth, if the patient has them) come to the maximum possible close contact with each other, the prosthesis is corrected in shape so that the aforementioned "occlusal plane" is located in a position in which the range of deviation of the plane from the aforementioned position falls in the range from +4° to -7.64° in the angle of inclination (hereinafter this position is sometimes referred to as the “ideal position” or “medical ideal position”).

[0089] The "occlusal plane" (ideally positioned) when wearing a prosthesis in a state where the upper body is in a vertical position is a plane inclined at a certain angle (with individual differences) to the horizontal plane. An "imaginary occlusal plane" RA, referred to as an "occlusal plane" located in a position where the occlusal plane is medically assumed to be in the patient's mouth, is described with reference to FIG. 7, fig. 10 and FIG. 11. In FIG. 7 to illustrate the ideal occlusal state, the plane defined by the next three points A1, A2 and A3 corresponds to the "imaginary occlusal plane" PA. In the present description, point: A1 represents the median point of the medial angle of each of the left and right central incisors 31B1 of the mandibular reference prosthesis 10B, point: A2 represents the apex of the distal-buccal cusp of the left second molar 31B7 of the mandibular reference prosthesis 10B, and point A3 represents the apex distally - buccal tubercle of the right second molar 31B7 of the reference prosthesis 10B of the lower jaw.

[0090] The "occlusal plane" and the position in which the occlusal plane is supposed to be located ("ideal position") is determined exactly as described above. However, the reference prosthesis of the present invention is not always required to be a complete prosthesis (complete prosthesis), and furthermore, the maxillary reference prosthesis and the mandibular reference prosthesis do not necessarily need to constitute a set. In addition, when determining the aforementioned vertical section on the control artificial tooth, the "occlusal plane" does not need to be in the "ideal position", and the vertical section on the control artificial tooth can also be determined with an arbitrary inclination of the occlusal plane, as long as the relative position is maintained. For example, when the occlusal plane is tilted to horizontal, the aforementioned vertical section over the reference artificial tooth becomes a vertical plane along a direction perpendicular to the polished surface in the anterior region passing through the aforementioned reference point. Accordingly, on the basis that all artificial teeth can come into close contact with the "occlusal surface", and the "occlusal surface" is approximated by a plane ("occlusal plane"), and the plane can be defined by at least three points, a vertical section along artificial tooth control is defined in the present invention as described below. With regard to the reference prosthesis base having three or more artificial teeth fixed thereto, the vertical plane along the direction perpendicular to the anterior polished surface passing through the above reference point when the reference prosthesis base is placed on a horizontal plane with the artificial teeth facing down is defined as vertical section along the control artificial tooth. In addition, with regard to the reference prosthesis base having less than three artificial teeth, the state in which it is assumed that the reference prosthesis base is worn naturally, and the vertical plane along the direction perpendicular to the anterior polished surface passing through the above reference point when the reference prosthesis base is held on a horizontal plane without changing the relative relative position with the "occlusal plane", in this case it is defined as a vertical section along the control artificial tooth. The teeth have irregularities at their distal ends and the teeth meet with the upper and lower teeth slightly offset or, in the case of a partial denture, slightly offset from the "occlusal plane" varies with position. Accordingly, when the base of the reference prosthesis is placed in a horizontal plane with the artificial teeth facing down, the vertical section of the reference artificial tooth based on this horizontal plane may be slightly offset from the vertical section of the reference artificial tooth based on the occlusal plane, and this displacement is almost non-existent. affects the definition of the preferred 3D shape described below and can be ignored.

[0091] 7-4. About the preferred three-dimensional shape of the reference prosthesis of the present invention

The preferred three-dimensional shape is described with reference to FIG. 8 and FIG. 10A and FIG. 9 and FIG. 11A by using the aforementioned vertical section over a control artificial tooth determined as described above. In the reference prosthesis of the present invention used as the aforementioned element of the reference prosthesis of the prosthesis of the present invention having the aforementioned appearance including the canine, the preferred three-dimensional shape is determined by the "vertical section over the artificial canine" which is the "vertical section over the artificial canine". tooth" when the artificial tooth 31A3 is defined as the reference artificial tooth and its tip 31A3p is defined as the reference point. The aforementioned "vertical section through the artificial canine" corresponds to the section _XA - _XA ', in FIG. 8 and the section XB-XB _{' in} FIG. 9 and their cross-sectional shapes are illustrated respectively in FIG. 10A and FIG. 11A. The width (thickness) of the aforementioned anterior basal region on the underside at a distance of 2 mm from the distal end of the basal border of the aforementioned anterior basal region in "vertical section along the artificial canine" is preferably 0.5 mm to 3 mm, particularly preferably 0.5 mm up to 2 mm. In addition, the width (thickness) of the aforementioned anterior basal region on the underside at a distance of 4 mm from the distal end of the basal boundary of the aforementioned anterior basal region in the aforementioned vertical section along the artificial canine is also preferably 0.5 mm or more, and 3 mm or less, particularly preferably from 0.5 mm to 2 mm. When the aforementioned widths (thicknesses) fall within such ranges, practical strength can be maintained, and furthermore, flange grinding work can be reduced in pre-checking.

[0092] In addition, in the reference prosthesis of the present invention, preferably, the vertical section along the artificial canine satisfies the following conditions depending on whether the reference prosthesis is the maxillary reference prosthesis or the mandibular reference prosthesis.

[0093] 7-5. About the Preferred Three-Dimensional Shape of the Reference Maxillary Prosthesis of the Present Invention

In particular, as illustrated in FIG. 8 and FIG. 10A, when the reference prosthesis of the present invention is a maxillary reference prosthesis, firstly, the difference in height (sometimes simply referred to as "LA1") between the distal end of the base boundary of the anterior base region and the reference point (apex 31A3p of artificial tooth 31A3) in the aforementioned vertical section along the artificial canine (corresponding to the section _{XA -XA} ', in Fig. 8) is preferably 13 mm to 20 mm, more preferably 15 mm to 17 mm. The above difference in height is the difference in height when the occlusal plane PA is defined as the reference and the direction perpendicular to the occlusal plane PA is defined as the height direction, and this is similarly applicable to another difference in height which defines the preferred three-dimensional shape.

[0094] Secondly, from the point of view that the allowable correction in the relatively anterior region of the palatal plate base region becomes large, and the occurrence of improper contact may be less likely, in the aforementioned vertical section along the artificial canine, the difference in height (sometimes simply indicated as "LA2") between the highest point HA of the palatal lamellar base region and the above reference point (apex 31A3p of artificial tooth 31A3) is preferably 10 mm to 16 mm, more preferably 13 mm to 15 mm.

[0095] Thirdly, the minimum thickness of the aforementioned palatal plate basal region is preferably 0.5 mm to 3 mm, more preferably 0.5 mm to 2 mm.

[0096] In addition, as illustrated in FIG. 8 and FIG. 10A, in the reference prosthesis of the present invention used as the reference element of the prosthesis of the present invention, having the above appearance, including the canine and the first molar, and which is a lamellar denture (full denture), in addition, to meet the above conditions in artificial canine vertical section, preferably "artificial first molar vertical section" (corresponding to section Y _A -Y _A ' in FIG. 8), which is "control artificial tooth vertical section" when artificial first molar 31A6 is defined as the control artificial tooth, and the top of its medial-buccal tubercle 31A6p is defined as a reference point, satisfy the following conditions.

[0097] In particular, fourthly, the difference in height (sometimes simply referred to as "LA3") between the distal end of the boundary of the basis of the aforementioned anterior region of the basis and the aforementioned reference point (apex of the melo-buccal cusp 31A6p of the 31A6 artificial first molar) in the aforementioned vertical cross section of the artificial first molar is preferably 11 mm to 16 mm, more preferably 12 mm to 14 mm.

[0098] Fifth, from the point of view that the allowable correction in the relatively posterior region of the palatal lamellar base region becomes large and the possibility of improper contact is reduced, in the aforementioned artificial first molar vertical section, the difference in height (sometimes simply referred to as " LA4") between the highest point HA' of the palatal lamellar basal region and the aforementioned reference point (apex of the mesio-buccal cusp 31A6p of the 31A6 artificial first molar) is preferably 11 mm to 18 mm, more preferably 15 mm to 17 mm.

[0099] 7-6. About the Preferred Three-Dimensional Shape of the Mandibular Reference Prosthesis of the Present Invention

When the reference prosthesis of the present invention is a mandibular reference prosthesis, as illustrated in FIG. 9 and FIG. 11A, the difference in height (sometimes simply referred to as "LB1") between the distal end of the basal boundary of the aforementioned anterior basal region and the aforementioned reference point (apex 31B3p of the artificial tooth 31B3) in the aforementioned vertical section along the artificial canine (corresponding to the section XB-XB' in FIG. 9) is preferably 13 mm to 18 mm, more preferably 15 mm to 17 mm.

[0100] Second, from the point of view that the allowable correction in the relatively anterior portion of the lingual portion of the base flange becomes large and the possibility of improper contact is reduced, in the aforementioned artificial canine vertical section, the height difference (sometimes simply referred to as "LB2 ") between the distal end of the HB base boundary of the aforementioned lingual portion of the base flange and the aforementioned reference point is preferably 9 mm to 13 mm, more preferably 10 mm to 12 mm.

[0101] Third, as illustrated in FIG. 9 and FIG. 11B, the difference in height (sometimes simply referred to as "LB3") between the distal end of the basal boundary of the aforementioned anterior basal region and the aforementioned reference point (apex of the melo-buccal cusp 31B6p of the 31B6 artificial first molar) in the aforementioned vertical section along the artificial first molar (corresponding to the section Y _B -Y _B ' in Fig. 9) is preferably 11 mm to 15 mm, more preferably 12 mm to 14 mm.

[0102] Fourth, from the point of view that the allowable correction in the relatively posterior region of the lingual region of the base flange becomes large, and the possibility of improper contact is reduced, in the aforementioned vertical section of the artificial first molar, the difference in height (sometimes simply indicated as " LB4") between the distal end of the basal boundary HB' of the aforementioned lingual portion of the basal flange and the aforementioned reference point is preferably 11 mm to 17 mm, more preferably 14 mm to 16 mm.

[0103] 7-7. About the preferred three-dimensional shape in case of having a preferred flat shape

As described above, preferably the reference prosthesis of the present invention has a flat shape as described in Patent Literature 2. In this case, with respect to the above-mentioned LA1-LA4 and LB1-LB4, the length of the segment: PQ (pq), which is the above reference length , described in Patent Literature 2, is taken as 1, and the length of the segment pq in the reference mandibular prosthesis is taken as 1, and the preferred lengths of the aforementioned LA1-LA4 and LB1-LB4 are described for the preferred range, more preferably, the ranges of the reference prosthesis of the present invention are as follows .

LA1: 0.28-0.50; 0.32-0.43

LA2: 0.21-0.40; 0.28-0.38

LA3: 0.23-0.40; 0.26-0.35

LA4: 0.23-0.45; 0.32-0.43

LB1: 0.21-0.35; 0.25-0.33

LB2: 0.15-0.25; 0.16-0.24

LB3: 0.18-0.29; 0.20-0.27

LB4: 0.18-0.33; 0.23-0.31

[0104] 8. Manufacturing method of the present invention The prosthesis of the present invention is manufactured by the manufacturing method of the present invention. In this case, it is preferable that the aforementioned reference prosthesis basis element in the prosthesis of the present invention to be manufactured includes a standardized target shape (target shape to be in-line manufactured) or a shape that is substantially the same as the target shape, and that the aforementioned corrective element has a shape corrected according to the shape of the patient's mouth so that, in a state in which the prosthesis is worn in the mouth of an individual wearer patient, the "occlusal plane" defined by the "occlusal surface", which is the surface, on which the teeth of the maxilla and mandible (in this document the term "teeth" means artificial teeth fixed to the prosthesis, and natural teeth, if the patient has them) come into close contact with each other, is located in a position in which the occlusal the plane is medically assumed to be located in the patient's mouth.

[0105] The manufacturing method of the present invention has a first feature in which the manufacturing method includes, as main steps, the following steps: step (A) of preparing a reference prosthesis, step (B) of determining a reference prosthesis, step (C) of "building on" and transfer, and stage (D) curing.

(A) The reference prosthesis preparation step is to prepare a reference prosthesis serving as a prosthesis reference element, including a reference prosthesis base element and artificial teeth.

(B) The step of determining the reference prosthesis is to determine the shape of the reference prosthesis to be used by (1) placing the reference prosthesis in the patient's mouth to place the reference prosthesis in the proper position on an imaginary occlusal plane considered as the occlusal plane located in position, in which the occlusal plane is medically assumed to be in the patient's mouth, thus checking the state of contact between the patient's oral mucosa and the reference prosthesis, or (2) fitting the reference prosthesis into an articulator having a model attached to it of the patient's mouth to place the reference prosthesis in the proper position on an imaginary occlusal plane considered as the occlusal plane placed in a position where the occlusal plane is medically thought to be in bands of the patient’s mouth, in order to check, therefore, the state of contact between the patient’s oral cavity model and the reference prosthesis, to select, in case of improper contact during use, a reference prosthesis having a different shape that does not allow improper contact to occur, or to fine-tune the shape of the element - base of the reference prosthesis in the reference prosthesis to prevent the specified contact.

(C) The "build-up" and transfer step is to "build-up" the curable material for the prosthesis base in the uncured state to form a corrective element on the mucosal-facing surface of the reference prosthesis base element in the reference prosthesis determined for use in the determination of the reference step. of the prosthesis, then placing the reference prosthesis having a curable prosthesis base material "on top" of it in the proper position, on an imaginary occlusal plane in the patient's mouth or articulator, and transferring the shape of the patient's oral mucosa or the shape of the patient's mouth model to the curable material for the base of the prosthesis and the formation of the edge to remove excess curable material for the base of the prosthesis.

(D) The curing step is to cure the curable material for the base of the prosthesis, which has passed the step of building on and transfer.

[0106] In addition, the manufacturing method of the present invention has a second feature, in which each of the step (C) "building" and transfer and step (D) curing includes a plurality of steps, in particular, the following steps (C1), ( C2) and (C3), and steps (D1), (D2) and (D3), respectively.

[0107] Steps (C1), (C2), and (C3) included in step (C) "build-up" and transfer

(C1) The step of "building on" and transferring in the central region is to "build on" the curable prosthesis base material in the uncured state in the central region of the base element of the reference prosthesis and transfer to it the shape of the patient's mouth or the shape of the model of the patient's mouth.

(C2) The "building on" and transferring step in the anterior region is to "build on" the curable prosthesis base material in the uncured state in the anterior region of the reference prosthesis base member, and transfer the patient's mouth shape or the patient's mouth model shape, and draw out the curable material for the base of the prosthesis in the uncured state from the border of the base with the formation of the edge.

(C3) The "building on" and transferring step in the posterior region is to "build on" the curable denture base material in the uncured state in the posterior region of the reference prosthesis base member, and transfer the patient's mouth shape or the patient's mouth model shape, and draw out the curable material for the base of the prosthesis in the uncured state from the border of the base with the formation of the edge.

[0108] In addition, in the manufacturing method of the present invention, the curing step (D) includes the following respective steps (D1), (D2), and (D3). However, as described below, these steps do not always need to be performed separately, and two or three steps may also be performed simultaneously.

Steps (D1), (D2) and (D3) included in the curing step (D)

(D1) The curing step of the curable material for the base of the prosthesis, which has passed the stage of "building on" and transfer in the central region.

(D2) The curing step of the curable material for the base of the prosthesis, which has passed the stage of "building on" and transfer in the anterior region.

(D3) The curing step of the curable material for the base of the prosthesis, which has passed the stage of "build-up" and transfer in the posterior region.

[0109] The manufacturing method of the present invention has a third feature, in which a plurality of steps included in the "build-up" and transfer step (C) are performed in many steps in a specific order. That is, after step (C1) is executed, step (C2) and step (C3) are executed. The step (C2) of "build-in" and transmission in the front region and the step (C3) of "build-in" and transmission in the rear region may be performed simultaneously or separately.

[0110] In each of steps (C1) to (C3), when the shape of the patient's oral mucosa or the shape of the patient's mouth model is transmitted, it is required to place a reference prosthesis having a curable prosthesis base material "built on" thereon in the uncured state , in the proper position on the plane considered as the occlusal plane. In step (C1) to be performed first, the mucosal surface of the central region of the base has the advantage of being easy to place due to its small radius of curvature. However, the mere application of a small force is likely to cause an up and down wobble of the front and back of the portion to which the force is applied, said portion acting as a center of rotation. Accordingly, in order to place the reference prosthesis in the proper position with sufficient accuracy to suppress such wobbling, it is preferable to use the positioning template 200 illustrated in FIG. 6A, 6B and 6C as described above.

[0111] When a maxillary prosthesis and a mandibular prosthesis are manufactured as a set, it is preferable to perform the transfer in step (C1) to “build on” the curable prosthesis base material in the uncured state on the mucosal-facing surface of the central area of the base of any of the reference maxillary prostheses. jaw and reference mandibular prosthesis, hold the reference prosthesis having the curable prosthesis base material "on top" of it on the setting template 200, then place the reference prosthesis in the patient's mouth or articulator, and hold the reference prosthesis in the proper position. From the point of view of reproducing the positional relationship of the maxilla and mandible when the maxillary prosthesis is manufactured first, it is more preferable that the transfer is performed by holding only the reference maxilla prosthesis on the setting template 200, and then performing the transfer for the reference mandibular prosthesis, said transfer is performed by holding the maxillary reference prosthesis and the mandibular reference prosthesis simultaneously (as a set) on the setting template 200. Either of the maxillary prosthesis and the mandibular reference prosthesis can be produced first.

[0112] Placement (holding in proper position) in step (C2) and/or step (C3) after step (C1) is completed is easier due to less wobble, and therefore one skilled in the art can perform placement separately for the reference prosthesis of the upper jaw and the reference mandibular prosthesis without using the installation template. In addition, any non-specialist in the art can easily perform high-precision transfer by using the setting template 200. In this case, step (C2) and/or step (C3) can be performed for any of the maxillary reference prosthesis and the mandibular reference prosthesis, which is being held. However, in order to perform high-precision transfer more reliably, transfer is preferably performed while holding both reference prostheses on the placement template 200.

[0113] In the curing step (D), after completion of each of the "build-up" and transfer steps, the respective curing steps (D1)-(D3) can be separately performed. Alternatively, after completion of all the "build-up" and transfer steps corresponding to the completed "build-up" and transfer steps, the respective curing steps (D1)-(D3) can be simultaneously performed. For example, when steps (C2) and (C3) are performed after the completion of step (C1) and step (D1), the curing step (D2) and the curing step (D3) may be performed simultaneously after completion of both the build-in and transmission steps, or may be performed separately after completion of each of the "build-in" and transfer steps. In addition, steps (C2) and (C3) can be performed without performing step (D1) after step (C1) is completed, after which (D1), (D2) and (D3) can be simultaneously performed.

[0114] In the manufacturing method of the present invention, when the form of the curable material for the base of the prosthesis is in the form of a corrective element, step (C1) may be performed as the first step, and then the steps of "building on" and transferring (C1) can be repeatedly repeated - (C3).

[0115] In addition, after completion of the "build-up" and transfer step in the anterior region and the "build-up" and transfer step in the posterior region, a repair step can also be included in which a curable prosthesis base material is added in an uncured state to the side surface facing the mucosa of the base of the reference prosthesis to correct the shape of the surface on the side of the surface facing the mucosa.

The repair step can be performed, for example, by adding a small amount of curable prosthesis base material in an uncured state to the surface of the mucosal side of the reference prosthesis base to fine-tune the shape to obtain better adaptability and curing the curable prosthesis base material after completion. a "build-up" and transfer step in the anterior region and a "build-up" and transfer step in the rear region, and before the final curing step is performed or after completion of the curing steps (D1), (D2) and (D3).

[0116] In the manufacturing method of the present invention, the reference prosthesis element is placed in the patient's mouth or in an articulator having a model of the patient's mouth attached to it, so that the prosthesis reference element is located in the proper position on the plane considered as the occlusal plane, on in step (B) of determining the reference prosthesis, and in addition, in step (C) of "building on" and transferring, the reference prosthesis element having a curable material for the basis of the prosthesis for a given corrective element, "stretched" in a given position of the base element of the reference prosthesis, is located in the proper position on the plane considered as the occlusal plane in the patient's mouth or in the articulator.

[0117] In this case, from the point of view that it is not required to make a model of the patient's mouth, which requires labor and time for manufacturing, it is preferable to install the reference element of the prosthesis in the patient's mouth. However, when the prostheses of a large number of patients are made in a dental laboratory, although labor and time are expended to make a model of the patient's mouth, it is preferable to use an articulator having a model of the patient's mouth attached to it, since a large number of prostheses can be made in parallel at the same time. .

[0118] In this case, the articulator is not particularly limited as long as the articulator is a device capable of reproducing jaw movements and various occlusal positions on the model. For example, an articular type articulator capable of reproducing the path of movement indicated by the mandibular condyle during mandibular movements, a non-adjustable articulator (mid anatomical articulator), and an adjustable articulator (fully adjustable articulator, semi-adjustable articulator) among articulators, can be used as an articulator, at the same time, the articulator of the arc type has an articular ball connected to the lower arch, and the articulator of the articular type has an articular ball connected to the upper arch, in which the position of the articular ball corresponding to the condyle of the lower jaw is different, the articulator is of a non-articular type, which does not reproduce the path of movement, indicated by the condyle of the mandible, but can open and close up and down, and the like. In addition, the patient's oral cavity model can be manufactured according to steps 1 and 2 of the custom fabrication method.

[0119] Step (B) of determining the reference prosthesis corresponds to the above preliminary check. In the method of the present invention, when the reference prosthesis of the present invention is used as the reference prosthesis element, the frequency of occurrence of cases in which the need for correction by grinding in step (B) of determining the reference prosthesis is low (see "non-overestimation rate", described below) and in most cases the reference prosthesis of the present invention can be used as the reference prosthesis element without modification. Even when correction by grinding is required, the amount of grinding may be extremely small. At the same time, the manufacturing efficiency is greatly increased.

[0120] In addition, in the manufacturing method of the present invention, as described as the above-mentioned third feature, the approximate placement is performed first by performing the fitting of the mucosal-facing surface of the central basal region. Then, in a situation in which the backlash width is small, fitting of the mucosal surfaces of the anterior portion (anterior basal region) and the posterior portion (posterior basal region) is performed, and shaping and fitting of an edge (basic boundary) is performed. In this case, any person who is not a specialist in the art can easily perform high-precision placement. In addition, although the height of the anterior portion of the reference prosthesis base flange and the length of the posterior portion of the reference prosthesis base are made (stretched) with a curable prosthesis base material such as a liner, the margin fit can be performed such that the boundary with the patient's mucosa is in a natural state.

[0121] When the method for manufacturing a prosthesis of the present invention is a method for manufacturing a prosthesis of the present invention, which is a maxillary prosthesis, the aforementioned reference maxillary prosthesis can be prepared as a finished reference prosthesis serving as a prosthesis reference element in step (A ) preparation of the reference prosthesis. When the method for manufacturing a prosthesis of the present invention is a method for manufacturing a prosthesis of the present invention, which is a mandibular prosthesis, the aforementioned mandibular reference prosthesis can be prepared as a finished reference prosthesis serving as a prosthesis reference element in step (A) of preparing the reference prosthesis.

[0122] Step (A) in the method for manufacturing a prosthesis of the present invention is a step of simply preparing a reference prosthesis serving as a member. In the example in which the maxillary prosthesis and the mandibular prosthesis are manufactured together by making a set of a maxillary reference prosthesis and a mandibular reference prosthesis, each corresponding to a complete lamellar denture (total prosthesis), steps (B), (C) and (D) are described in detail with reference to the drawings. The manufacturing method of the present invention is not limited to such an example.

[0123] B: Step to determine the reference prosthesis

The maxillary reference prosthesis 10A and/or the mandibular reference prosthesis 10B are placed in the proper position on the imaginary occlusal plane PA (see FIG. point of view is located in the patient's mouth, and the contact state between the patient's mouth model 150 and the maxillary reference prosthesis 10A and the mandibular reference prosthesis 10B is checked by using the articulator 100 as illustrated in FIG. 5 (hereinafter, such checking of the contact condition by using an articulator is sometimes referred to as "overestimation checking").

[0124] In FIG. 5 illustrates a state in which the patient mouth model 150, specifically, the patient mouth model 150 formed from the upper jaw model 151 and the lower jaw model 152 are attached to the articulator 100. When the upper jaw reference prosthesis 10A and the lower jaw reference prosthesis 10B installed in an articulator 100 having attached thereto a patient mouth model 150 illustrated in FIG. 5, and the contact state between the patient mouth model 150 and the maxillary reference prosthesis 10A and the mandibular reference prosthesis 10B is checked (inflated check is performed), it is preferable to use the setting template 200 as illustrated in FIG. 6A, 6B and 6C.

[0125] In the setting template 200, a reference prosthesis holding portion 201 and a handle 202 connected to the reference prosthesis holding portion 201 are provided. In the reference prosthesis holding portion 201, a maxillary prosthesis holding recess 201A configured to hold the upper maxillary reference prosthesis 10A and a lower jaw prosthesis retaining recess 201B configured to hold the mandibular reference prosthesis 10B are formed. In addition, the handle 202 is of such a length that a dental technician, dentist, or the like can easily manipulate the handle 202 to place the maxillary reference prosthesis 10A and the mandibular reference prosthesis 10B from outside the articulator 100 or from outside the patient's mouth. Accordingly, an operator, such as a dental technician, can easily place the maxillary reference prosthesis 10A and/or the mandibular reference prosthesis 10B in the proper position on the imaginary occlusal plane PA (see FIG. 7) by using the handle 202. Also, when the contact condition is verified by placing the maxillary reference prosthesis 10A and the mandibular reference prosthesis 10B in the patient's mouth, for the same reason it is preferable to use the placement template 200.

[0126] In the above overestimation test, the contact state can be judged based on the amount of lift (sometimes referred to as the "overestimation value") of the guide pin 101 of the articulator 100 when the maxillary reference prosthesis 10A and the mandibular reference prosthesis 10B meet each other on an imaginary occlusal plane RA (see FIG. 5), so that the maxillary reference prosthesis 10A and the mandibular reference prosthesis 10B are immobilized. Specifically, when the aforementioned lift amount (overestimation value) is 0 mm or less, it is judged that there is no improper contact, and correction by grinding is not required, resulting in a reduction in running time for grinding. Here, when the overestimation value is more than 0 mm, it is judged that an improper contact exists, and when the specified value is larger, the grinding amount of correction by grinding is larger. Based on the above case, in which the lift amount (overestimation value) of the guide pin 101 is 0 mm or less, it is considered successful, and the above process continues to the next step. The case in which the aforementioned lift amount (overestimation value) is less than 0 mm means the case in which the position of the guide pin 101 is not lowered and there is a gap between the reference prosthesis and the model. In this case, at a later stage, the gap is filled with a correction element.

[0127] Herein, when an overestimation check is performed by using the reference maxillary prosthesis 10A of the present invention and the reference mandibular prosthesis 10B of the present invention satisfying the aforementioned dimensional requirements, the aforementioned lift amount of the guide pin 101 is less than 0 mm or is given in a state in which a slight correction is sufficient.

[0128] In the above description, an overestimation check is performed by using the articulator 100. However, the contact state can be checked as described below without performing an overestimation check by using the articulator 100. The upper jaw reference prosthesis 10A and the lower jaw reference prosthesis 10B are mounted directly in the patient's oral cavity and are placed in the proper position on the imaginary occlusal plane PA (see Fig. 7), and in this state, the state of contact between the patient's oral mucosa and the maxillary reference prosthesis 10A and the mandibular reference prosthesis 10B is checked. This contact status check also corresponds to step (B) of determining the reference prosthesis.

[0129] In addition, in step (B) of determining the reference prosthesis, the maxillary reference prosthesis 10A and the mandibular reference prosthesis 10B are held on the setting template 200, as illustrated in FIG. 6A, 6B and 6C. However, without using the placement template 200 as described above, the maxillary reference prosthesis 10A and the mandibular reference prosthesis 10B can be placed in the articulator 100, or the maxillary reference prosthesis 10A and the mandibular reference prosthesis 10B can be placed in the patient's mouth.

[0130] In addition, in the step (B) of determining the reference prosthesis, when the existing occlusal surface is displaced from the proper position when checking the contact condition as described above, the reference prosthesis (maxillary reference prosthesis 10A and mandibular reference prosthesis 10B) can be placed in the proper position by performing a correction by grinding, or another reference prosthesis can be selected that does not cause the aforementioned positional misalignment.

[0131] C: build-in and transfer step

In this step, the curable prosthesis base material in the uncured state to form the aforementioned corrective element is “built on” to the surface on the mucosal side of the aforementioned reference prosthesis base element in the reference prosthesis determined for use in step (B) of determining the reference prosthesis , for example, the basis 20A of the reference prosthesis 10A of the upper jaw.

The aforementioned curable denture base material is typically "built on" after removal of the maxillary reference denture 10A and the mandibular reference denture 10B from the placement template 200, but can be "built on" when the maxillary reference denture 10A and the mandibular reference denture 10B are mounted on the placement template. template 200.

As described above, this step includes (C1), (C2) and (C3), and their contents and execution order are described above.

[0132] In addition, in the "building on" and transfer step, the aforementioned "built on" curable prosthesis base material is formed in the form of the aforementioned corrective element. For example, the maxillary reference prosthesis 10A and the mandibular reference prosthesis 10B having the settable prosthesis base material “built on” thereon are reattached to the mounting template 200 and placed in the proper position in the articulator 100. These molds are then transferred to the settable base material. of the prosthesis in a state in which the prosthesis base material is pressed against the upper jaw model 151 and the lower jaw model 152, and the upper jaw model 151 and the lower jaw model 152 are engaged with each other. After such transfer, in the state in which the maxillary reference prosthesis 10A and the mandibular reference prosthesis 10B are mounted on the setting template 200, the maxillary reference prosthesis 10A and the mandibular reference prosthesis 10B are immediately removed from the articulator 100. Thereafter, the excess curable prosthesis base material is removed from the 10A maxillary reference prosthesis and the mandibular reference 10B prosthesis.

[0133] At the same time, the maxillary reference prosthesis 10A and the mandibular reference prosthesis 10B having a curable prosthesis base material "built on" thereon can be directly pressed against the inside of the patient's mouth by using the placement template 200 without using the articulator 100 for transferring the shape of the inside of the patient's mouth. In addition, these operations can also be performed without using the installation template 200.

[0134] D: Curing step

In this step, the aforementioned curable prosthesis base material formed in the form of a corrective element in the build-up and transfer step (C) is cured to form a corrective element, and said corrective element is combined with the reference prosthesis base element.

The polymerization cure is appropriately determined depending on the kind of polymerization activator contained in the curable prosthesis base material. For example, in the case of photopolymerization using a polymerization photoactivator, the material for the base of the prosthesis can be cured by irradiation with light, such as UV rays, which activates the activator. In addition, in the case of thermal-type polymerization using a thermal polymerization activator, the prosthesis base material may be cured by heating. In addition, in the case of using a chemical type of polymerization using a chemical polymerization activator, the material for the basis of the prosthesis can be cured for a predetermined period of time.

Through each of these steps as described above, a prosthesis can be fabricated using the maxillary reference prosthesis 10A and the mandibular reference prosthesis 10B.

Examples

[0135] For a specific description of the present invention, the present invention has been described by means of Examples and Comparative Examples, but the present invention is not limited to them.

1. About the Prosthesis of the Present Invention and the Reference Prosthesis of the Present Invention

Examples 1-12 and Comparative Examples 1 and 2

(1) Making a reference prosthesis

Each reference prosthesis base having the surface shape shown in Table 1 and the partial cut shape shown in Table 2 was made by subjecting a polymethyl methacrylate resin to injection molding using a plaster mold made by investment casting. Then, artificial teeth were placed on the fabricated reference prosthesis base to fabricate the maxillary reference prosthesis and the mandibular reference prosthesis, which are complete dentures in type.

Symbols such as OM and P1D1 in Table 2 indicate the respective lengths described in section (7-1. About the preferred flat shape), and the numerical values in each column indicate the relative lengths (lengths when the length of the segment PQ or segment pq is taken as 1 ) segment of the specified character. In addition, LA1-LA4 and LB1-LB4 in Table 3 correspond to the definitions in sections (7-5. About the preferred three-dimensional shape of the reference maxillary prosthesis of the present invention and 7-6. About the preferred three-dimensional shape of the reference mandibular prosthesis of the present invention. ) In addition, the specified thickness means the minimum thickness of the palatal plate area 20A3 of the basis of the reference maxillary prosthesis.

[0136] As described below, prostheses made by using the reference prostheses of Comparative Examples 1 and 2 do not match the prosthesis of the present invention.

[0137] (2) Making a prosthesis

(2-1) Preparing the patient's mouth model

20 kinds (20 sets) of "patient mouth models each formed from a set of an edentulous upper jaw model and an edentulous lower jaw model" having various shapes were made. Table 3 shows the variation in the form of the patient's oral model for the upper jaw and the patient's oral model for the lower jaw with respect to the above 20 kinds (sets) of the patient's oral models.

[0138] The spread presented in Table 3 is represented by the minimum value: minimum (mm), maximum value (mm) and standard deviation obtained by measuring "alveolar process height in the anterior region" and "alveolar process height of the molar dental region" for each of the patient's mouth models and the PQ line (in the case of the upper jaw) and the pq line (in the case of the lower jaw model) described in section "7-1. About the Preferred Flat Shape". In this document, the term "alveolar height" means the vertical distance from the apex of the alveolar process to the occlusal plane. In addition, in the maxilla model, in areas obtained by evenly dividing the distance from the "most anterior portion of the incisive papilla" to "the intersection between the line connecting the left pterygomandibular fissure and the right pterygomandibular fissure and the midline of the palatine suture" into three parts, the height of the alveolar ridge in the anterior third is defined as "the height of the alveolar ridge of the anterior tooth region" and the height of the alveolar ridge in the posterior third is defined as the "height of the alveolar ridge of the molar tooth region". In addition, in the mandible model, in the areas obtained by evenly dividing the distance from the "midline of the alveolar process site" to "the intersection between the line connecting the anterior edge of the left retromolar tubercle and the anterior edge of the right retromolar tubercle and the midline" into three parts, the height the height of the alveolar process in the anterior third is defined as the "height of the alveolar process of the anterior dental region", and the height of the alveolar process in the posterior third is defined as the "height of the alveolar process of the dental region".

[0139] (2-2) Making a prosthesis

All 20 sets of prostheses, respectively fitted to the above 20 sets of patient mouth models, were fabricated in each of the Examples by using the specified reference prosthesis of each of the Examples and each of the comparative examples presented in Tables 1 and 2. In particular, the articulator illustrated in fig. 5 was prepared as an articulator. installation template,

illustrated in FIG. 6A, 6B and 6C was prepared as an installation template. In addition, 20 kinds (20 sets) of "patient mouth models each formed from a set of an edentulous upper jaw model and an edentulous lower jaw model" having various shapes shown in Table 3 were prepared as the above-mentioned patient mouth models. . Then, one set of 20 sets of the patient's mouth models was installed in the articulator, and a prosthesis was made to fit the patient's mouth model, as described below.

[0140] In particular, the reference prosthesis to be used has already been prepared. Accordingly, the maxillary reference prosthesis was first held on the placement template to check for the presence or absence of improper contact. When improper contact was detected (contact was determined to be improper), correction was carried out by grinding using a hand-held grinder until the improper contact was eliminated (contact became proper) (step (B) of determining the reference prosthesis). After that, step (B) of determining the reference prosthesis was also performed in relation to the mandible. The curable denture base material, in the uncured state, was then "built on" the mucosal-facing surface of the central area of the maxillary reference denture base. After "building on" only the received reference prosthesis of the upper jaw

held on the installation template. The resulting element was installed in the articulator and held in the proper position. Then, in step (C1), transmission was performed. After that, the curable material for the basis of the prosthesis in the uncured state was "built on" on the surface facing the mucous membrane, the central region of the basis, and on the reference mandibular prosthesis. The reference mandibular prosthesis obtained after "building on" and the reference maxillary prosthesis after transfer were simultaneously held (as a set) on the setting template. The resultant was then placed in the articulator and held in the proper position. Then, the transmission step (C1) was performed. After performing the transmission to (C1) as described above, steps (C2) and (C3) were performed without performing step (D1). In this case, in steps (C2) and (C3), the maxillary and mandibular reference prostheses were individually placed into the articulator by using the placement template, and held in the proper position. Then the transfer and formation of the edge were performed. Then the repair phase was performed. Finally, as a step (D), all curable materials for denture bases (photocurable liner: TOKUSO LIGHT-REBASE manufactured by Tokuyama Dental Corporation) were simultaneously cured, thus making one set of maxillary and mandibular dentures. This work was then repeated also for another patient's mouth model, and finally 20 sets of maxillary and mandibular prostheses fitted to all 20 sets of the patient's mouth models were fabricated by the manufacturing method of the present invention.

[0141] In each of Examples 1-12, a prosthesis of the present invention is made, wherein the distal end area of the baseline of the entire area of the baseline in the aforementioned anterior region is formed from the aforementioned anterior corrector, and the distal end area of the baseline of the entire area of the baseline in the aforementioned rear area is formed from the aforementioned rear correction element. In contrast, in Comparative Examples 1 and 2, although the prosthesis was manufactured by the manufacturing method of the present invention, "improper contact" was found near the boundary of the basis of the anterior region of the basis in step (B) of determining the reference prosthesis, and therefore the prosthesis was manufactured by performing a correction by grinding. As a result, the basis border in the anterior region of the manufactured prosthesis was formed from the reference prosthesis, and the anterior corrective element did not extend onto the polished surface of the anterior portion of the flange. Accordingly, the prosthesis made in each of Comparative Examples 1 and 2 does not match the prosthesis of the present invention, and therefore the reference prosthesis in each of Comparative Examples 1 and 2 does not match the reference prosthesis of the present invention.

[0142] (3) Evaluation of reference prosthesis and prosthesis

In the aforementioned prosthesis fabrication step, the adaptability (non-overestimated proportion and adaptability proportion) of the reference prosthesis used to the patient's oral model, manufacturing time and correction time were evaluated, and the proportion of the anterior corrector on the polished surface of the "anterior portion of the canine flange" of the resulting prosthesis was evaluated. (hereinafter, sometimes simply referred to as "height adjustment allowable fraction") as a percentage (%).

Each evaluation parameter is described below.

[0143] About the assessment of the share without overstatement

The non-overestimation rate is an indicator for indicating the incidence of "cases in which it is determined that correction is necessary by grinding due to the presence of an area that comes into contact with the mucous membrane and the like, which may cause pain to the patient, in step (B) of determining the reference of the prosthesis of the method for manufacturing a prosthesis of the present invention In Examples (Examples 1 to 12) and Comparative Examples (Comparative Examples 1 and 2), the proportion without overestimation is defined as the proportion of cases that pass the test when step (B) of determining the reference prosthesis (assessment by measurement overestimation value) using an articulator is performed for the above 20 kinds (20 sets) of "patient mouth models, each of which is formed by a set of an edentulous upper jaw model and a edentulous lower jaw model" having different shapes, and it is concluded that the variety patients can be considered as a way to test in real conditions (as a method that does not require the involvement of a large number of patients).

[0144] The above proportion without overestimation can also be defined as an estimated indicator reflecting the degree of universality, which serves as an indicator for indicating to which set of patients can be applied one set (combination) of the maxillary reference prosthesis and the mandibular reference prosthesis to be evaluated, ( in other words, an indicator for assessing the width of the range of adaptability to different patients). When the values of the proportion without overestimation are higher, the degree of universality becomes higher (the range of adaptability to different patients becomes wider). When the value without overestimation is 80% or more, the degree of universality is defined as high, and the value of the share without overestimation is more preferably 90% or more, most preferably 100%.

[0145] The above evaluation by measuring the value of overestimation was performed as follows. That is, first, a patient mouth model 150 formed from one set consisting of an edentulous upper jaw model 151 and a lower jaw model 152 randomly selected from 20 kinds (20 sets) having different shapes was attached to the articulator 100, as illustrated in fig. 5. Thereafter, the maxillary reference prosthesis and the mandibular reference prosthesis were held on the setting template 200 as illustrated in FIG. 6A, 6B and 6C to obtain a proper closure condition. Then, the resultant was placed in the articulator 100 while maintaining the occlusion state, and the amount of lift (overestimation value) of the guide pin 101 was measured when the resultant was placed so that the occlusion with each other occurred on the occlusal plane PA. Cases in which the measured value reached 0 mm or less were considered successful, and thus success or failure was judged. As described above, after completion of the evaluation, said one set of patient mouth model 150, said patient mouth model 150 installed on the mounting template 200, was replaced with a set randomly selected from the remaining 19 sets. Then the success or failure was evaluated in the same way, and in addition, such evaluation was repeated until the full assessment of success or failure in relation to all sets (20 sets). Shares without overestimation were obtained based on the reported results.

[0146] About assessing the proportion of adaptability

The proportion of adaptability is a measure for indicating the degree of frequency of occurrence of cases defined as "appropriate", when the case is determined as appropriate or not based on whether or not the reference prosthesis having "built on" it in step (C) of "building on" and transferring the method for manufacturing a prosthesis of the present invention, the curable material for the basis of the prosthesis, be placed in the proper position in the articulator 100 having the model 150 of the patient's mouth installed therein.

[0147] In the examples (Examples 1-12), in the same manner as when measuring the proportion without overestimation, 20 kinds (20 sets) of the patient's oral cavity models 150 having different shapes were used, and it was studied whether or not the patient's oral cavity models 150 could patient, having different shapes, be located in the proper position (on the occlusal plane of the RA). However, in order to reduce the effect of the three-dimensional shape and observe the effect of the flat shape, the maxillary reference prosthesis and the mandibular reference prosthesis were evaluated independently, respectively, instead of the state in which the maxillary reference prosthesis and the mandibular reference prosthesis were interlocked with each other. Specifically, by using the mounting template 200 as illustrated in FIG. 6A, 6B, and 6C, in an articulator 100 in which a patient mouth model 150, formed from an edentulous upper jaw model 151 and a lower jaw model 152, is mounted, a maxillary reference prosthesis (or a mandibular reference prosthesis) having "built on" thereon the curable material for the base of the prosthesis, independently installed in the maxillary model 151 (or mandible model 152) attached to the articulator 100, and it was determined whether the maxillary reference prosthesis (or the mandibular reference prosthesis) could or could not be placed in the proper position. Such work was performed on 20 kinds of patient mouth models 150, and the proportion of the number of models in which the maxillary reference prosthesis (or mandibular reference prosthesis) could be placed in the proper position was defined as the proportion of adaptability.

[0148] About manufacturing time estimation: tP

The manufacturing time was determined as described below. That is, first, as a reference example, prostheses fitted to the above-mentioned 20 kinds (20 sets) of patient mouth models 150 having various shapes were manufactured by the individual manufacturing method, and the time (minutes) required to manufacture each of the prostheses was measured. Based on the measured values, the average time (minutes) needed to manufacture one prosthesis was determined and presented as t _P-Cust . Then, prostheses corresponding to the above 20 kinds (20 sets) of patient mouth models 150 having different shapes were manufactured by using the upper jaw reference prosthesis and the lower jaw reference prosthesis in each of the Examples and each of the Comparative Examples. Then, in the same manner as described above, the average time (minutes) needed to make one prosthesis was determined in each of the Examples and each of the Comparative Examples, and the average time was presented as t _P-Exp . Then, the percentage was determined: (t _P-Exp /t _P-Cust ) ×100 (%) obtained by normalizing t _P-Exp to t _P-Cust , and the manufacturing time was estimated using this value. When the value is lower, the manufacturing time of the prosthesis is shortened compared to the custom manufacturing method.

[0149] In the manufacturing method of the present invention in these Examples, steps (B) and (C) are performed by fitting into a patient's mouth model. Accordingly, the time needed to make a model of the patient's mouth (corresponding to the time needed to "take an impression of the inside of the patient's mouth by using an impression material" in step 1 of the custom-made method, and "make a plaster model with an impression" in step 2 of the method custom-made) are excluded from the aforementioned t _P-Cust and t _P-Exp , respectively. When steps (B) and (C) are performed by directly inserting into the patient's mouth in the manufacturing method of the present invention, the time required to manufacture the patient's mouth model is not required, and therefore t _P-Exp can be reduced by this time. In this case, the effect of the present invention becomes more pronounced.

To eliminate the influence caused by the difference in the flat shape of the reference prostheses and confirm the effect caused by the difference in the three-dimensional shape, it is required to compare the manufacturing time of the reference prostheses (for example, Examples 1-10 and Comparative Example 2) having the same flat shape.

[0150] About correction time estimation: t _A

The correction time is determined as described below. That is, when prostheses fitted to the above 20 kinds (20 sets) of patient mouth models 150 having different shapes were manufactured by using the upper jaw reference prosthesis and the lower jaw reference prosthesis, the average time required for the reference prosthesis to was determined to be appropriate in step (B) of determining the reference prosthesis (when the reference prosthesis was determined to be inadequate, a correction was performed by grinding and the step of determining the reference prosthesis was performed again and repeated until the reference prosthesis was determined to be appropriate) was defined as the correction time.

[0151] In evaluating the correction time, the correction time (minutes) in Comparative Example 1 was determined as the reference time t _AS , and the correction time (minutes) in each of the Examples and Comparative Example 2 was determined as t _A-Exp . Then, the correction time was estimated with a percentage: (t _P-Exp /t _AS ) x 100 (%), by normalizing t _A-ExP to the above reference time t _AS . When the value of the correction time is lower, the manufacturing time of the prosthesis is shortened compared to Comparative Example 1.

[0152] In order to eliminate the influence caused by the difference in the flat shape of the reference prostheses and confirm the effect caused by the difference in the three-dimensional shape also in relation to the correction time, it is necessary to compare the correction time of the reference prostheses (for example, examples 1-10 and comparative example 2) having the same flat shape. In addition, even in reference prostheses having the same flat shape, the correction time depends on differences in three-dimensional shape, and in addition, the effect on the correction time is reflected in the manufacturing time.

[0153] About Evaluation of Percentage Height Correction Percentage

The allowable height correction proportion is a measure for indicating whether or not there is an area that comes into improper contact with the mucous membrane and the like that causes pain to the patient, and there is an allowable correction for adding a corrective element when the prostheses fitted) to the above 20 kinds (20 sets) of patient mouth models 150 having different shapes are manufactured by using the upper jaw reference prosthesis and the lower jaw reference prosthesis. In these examples and comparative examples, the ratio of the height of the corrective element to the height of the anterior portion of the flange in the canine region of the reference prosthesis is defined as the proportion of allowable height correction.

[0154] When evaluating the proportion of allowable correction in height (mm) from the cervical line of the prosthesis to the baseline is defined as the reference height h _s , and the difference in height (mm) from the baseline of the reference prosthesis to the baseline of the prosthesis is defined as the height h _Adj of the corrective element . Then, the proportion of allowable height correction was evaluated as a percentage: (h _Adj /t _S ) × 100 (%) obtained by normalizing the height h _Adj of the correction element to the above-mentioned reference height h _S . When the proportion of allowable height correction is smaller, the allowable correction is smaller. The case where the proportion of allowable height correction is 0% corresponds to the case in which the height has been corrected by grinding the reference prosthesis.

The results of the assessment are presented in Table 4.

[0155] As shown in Table 4, in Examples 1-12, reference prostheses having the shapes shown in Tables 1 and 2 were made and evaluated in terms of adaptability fraction, no overestimation fraction, fabrication time, correction time, and correction fraction in height. The evaluation results became satisfactory, as presented in Table 4.

[0156] Meanwhile, in Comparative Example 1, in which 20 prostheses are manufactured by using, as a reference prosthesis, a prosthesis manufactured by a custom fabrication method to fit one set of a patient's mouth model randomly selected from the above 20 sets, the allowable no correction was formed, in contrast to these examples, and, therefore, improper contact could not be avoided in the oral models of 19 patients. Thus, it is necessary to adjust the reference prosthesis having a large height and a large thickness to fit the oral cavity by grinding, and the proportion of allowable height correction becomes 0%, while both the correction time and the manufacturing time are greatly increased.

[0157] In addition, in Comparative Example 2, in which a prosthesis is manufactured by using a reference prosthesis having the same flat shape as in Example 1, but having a greater height and greater thickness, a valid correction is unlikely to be formed, and the prosthesis comes into contact with a model of the patient's mouth. Thus, it is required to adjust the reference prosthesis having a large height and a large thickness to fit the oral cavity by grinding, and the correction of the allowable height correction fraction becomes 0%, while both the correction time and the manufacturing time are significantly reduced compared to Example 1.

The reference example describes the manufacturing time required to manufacture a prosthesis using a custom fabrication method, said prosthesis being fitted to one set of patient mouth models randomly selected from the above 20 sets of patient mouth models.

[0158] 2. About the manufacturing method of the present invention

Examples 1-12

As described above, Examples 1 to 12 are examples in which the prosthesis was each made by the manufacturing method of the present invention. In these examples, step (C) of "building" and transferring is divided into a plurality of steps. The transmission is performed in step (C1), and then (C2) and (C3) are performed without performing step (D1). In steps (C2) and (C3), each of the maxillary reference prosthesis and the mandibular reference prosthesis having a curable prosthesis base material "on" thereon in the uncured state, was separately placed in the articulator by using a placement template, and held in the proper position. position to perform transfer and edge formation. In this case, the transfer and formation of the edge could be performed in the proper position at the same time without disturbance.

[0159] Comparative Example 3

This comparative example is an example in which step (C) of "build-in" and transmission was performed in one step, and the state was checked in this case. Specifically, the curable denture base material in the uncured state was "built on" to each mucosal-facing surface, central base area, anterior base area, and posterior base area of the maxillary reference prosthesis by using the same reference prosthesis as in Example 1. Transfer was performed in the same way, except for holding the reference maxillary prosthesis, which has a curable prosthesis base material "on top" of it everywhere, on the mounting template, setting the resulting prosthesis into the articulator, and pressing the surfaces facing the mucosa against the surface of the mucous membrane of the model of the upper jaw of the patient's mouth. In this case, the edge was formed in a state in which the position was not determined. Accordingly, said position was likely to be misaligned and the curable denture base material "built on" the posterior base region came into contact with the model and deformed during installation. In addition, the set prosthesis base material was extruded during pressing with a slight inclination to the inside, and the excess set prosthesis base material was not sufficiently extended from the boundary of the reference prosthesis base. Thus, it was not possible to perform a successful transmission at this time. By the time successful transfer and margin formation could eventually be successfully performed, it was necessary to repeat the operation several times, including removing the reference prosthesis base from the articulator after the first transfer, removing a small amount of excess curable material for the prosthesis base, partial addition of curable material for the base of the prosthesis, setting the base of the reference prosthesis again and then performing the next transfer. Accordingly, the manufacturing time was significantly increased compared to Example 1.

List of reference positions

[0160] 1 prosthesis

1A upper jaw prosthesis

1B lower jaw prosthesis

1A4, 1B4 mucosal surface

1A5, 1B5 polished surface

1А6, 1В6 basis boundary

1A7, 1B7 cervical line

1A8, 1B8 flange

2 basis of the prosthesis

2A base of the upper jaw prosthesis

2In the basis of the prosthesis of the lower jaw

2A1, 2B1 central area

2A2, 2B2 front area (front section of the flange)

2A3 posterior region (palatal plate region)

B3 back area (tongue area of the flange)

4 element-basis of the reference prosthesis

4A base element of the reference prosthesis of the upper jaw

4B base element of the reference mandibular prosthesis

5 reference element of the prosthesis

5A maxillary prosthesis reference element

5B mandibular prosthesis reference element

6 corrective element

6A1, 6B1 central corrective element

6A2, 6B2 front corrective element

6A3 posterior corrective element (corrective palatine plate area)

6B3 rear corrective element (corrective tongue section of the flange)

10 reference prosthesis (according to the present invention) (corresponding to the reference element of the prosthesis)

10A Maxillary reference prosthesis (of the present invention) (corresponding to the maxillary prosthesis reference element)

10B reference mandibular prosthesis (of the present invention) (corresponding to the mandibular prosthesis reference element)

20 base of the reference prosthesis (corresponding to the base element of the reference prosthesis)

20A reference maxillary prosthesis base (corresponding to the maxillary reference prosthesis base element)

20 V base of the reference mandibular prosthesis (corresponding to the base element of the reference mandibular prosthesis)

20A1, 20B1 central region of the basis

20A2, 20B2 front area of the base (front section of the base flange)

20A3 posterior region of the basis (palatal lamellar region of the basis)

20A3a surface facing the mucosa of the palatal lamellar region of the basis

20B3 rear region of the base (lingual section of the base flange)

20B3a the mucosal surface of the lingual portion of the base flange

21A, 21B flange

21B2 tongue flange

22A, 22B baseline

22А1, 22В1 labial boundary of the basis

22A2, 22B2 buccal border of the basis

23A, 23B mucosal surface

4A, 24V polished surface

30, 30A, 30B artificial dentition

31, 31A, 31B artificial tooth

31A1, 31B1 artificial central incisor

31A3, 31B3 artificial canine

31А3р, 31В3р artificial canine apex

31A6, 31B6 artificial first molar

31А6р, 31В6р apex of the medio-buccal tubercle of the artificial first molar

31A7, 31B7 artificial second molar

RA imaginary occlusal plane

A1 midpoint of the medial angle of each of the left and right central incisors of the reference mandibular prosthesis

A2 apex of the distal-buccal cusp of the left second molar of the reference mandibular prosthesis

A3 apex of the distal-buccal cusp of the right second molar of the mandibular reference prosthesis

ON the highest point of the palatal lamellar region of the basis

HB height of the distal end of the border of the base of the lingual section of the base flange

LAI, LB1 difference in height between the distal end of the border of the basis of the anterior region of the basis and the apex of the artificial canine in a vertical section along the artificial canine

LA2 height difference between the highest point of the base plate palatal region and the apex of the artificial canine in a vertical section along the artificial canine

LB2 difference in height between the distal end of the basal border of the lingual portion of the basal flange and the apex of the artificial canine in a vertical section along the artificial canine

LA3, LB3 difference in height between the distal end of the border of the basis of the anterior region of the basis and the top of the medio-buccal tubercle of the artificial first molar in a vertical section along the artificial first molar

LA4 Difference in height between the highest point of the palatal laminar region of the base and the apex of the mesio-buccal cusp of the artificial first molar in vertical section along the artificial first molar

LB4 difference in height between the distal end of the basal border of the lingual portion of the basal flange and the apex of the mesio-buccal cusp of the artificial first molar in vertical section along the artificial first molar

100 articulator

101 guide pin

150 patient mouth model

151 models of the upper jaw

152 lower jaw model

200 installation template

201 reference prosthesis holding area

201A Retaining recess for maxillary prosthesis

201B retaining recess for mandibular prosthesis

202 handle.

Claims (16)

1. A reference prosthesis to be used as a reference element of the prosthesis for the manufacture of the prosthesis and having a given shape and size, containing: the base of the reference prosthesis, which corresponds to the reference element of the prosthesis and contains the main section of the base of the prosthesis to be manufactured, artificial teeth that are fixed to the base of the reference prosthesis and serve as artificial teeth of the prosthesis to be fabricated, wherein the basis of the reference prosthesis is smaller than the prosthesis to be fabricated. 2. The reference prosthesis of claim 1, wherein when at least one of the artificial teeth is determined to be a substantial artificial tooth, said significant artificial tooth is selected from the group consisting of a first premolar, a second premolar, a first molar, and a canine, wherein significant artificial teeth include an artificial canine, and when the reference prosthesis is placed on a plane considered as the occlusal plane, with the side with artificial teeth facing downward, in a vertical section made along the surface along a perpendicular direction relative to the polished surface of the anterior region of the basis, which is perpendicular the specified plane and passes through the top of the artificial canine, the anterior base region on the underside at a distance of 2 mm from the distal end of the base boundary of the anterior base region of the reference prosthesis has a width of 0.5 mm or more and 3 mm or less. 3. The reference prosthesis according to claim 2, in which the reference prosthesis is a reference prosthesis of the upper jaw, while in vertical section, the distal end of the border of the basis of the anterior region of the basis and the top of the artificial canine have a height difference of 13 mm or more and 20 mm or less. 4. The reference prosthesis according to claim 2 or 3, wherein the reference prosthesis is a maxillary reference prosthesis and the palatal plate base portion has a minimum thickness of 0.5 mm or more and 3 mm or less. 5. The reference prosthesis according to claim 2, wherein the reference prosthesis is a reference mandibular prosthesis, wherein in vertical section the distal end of the baseline of the anterior base region and the top of the artificial canine have a height difference of 13 mm or more and 18 mm or more. less. 6. A method for manufacturing a prosthesis, comprising: (A) a reference prosthesis preparation step in which a reference prosthesis according to claim 1 is prepared serving as a reference prosthesis element including a reference prosthesis base element and artificial teeth; (B) a reference prosthesis determination step in which the shape of the reference prosthesis to be used is determined by (1) inserting the reference prosthesis into the patient's oral cavity to place the reference prosthesis in an appropriate position on an imaginary occlusal plane considered as an occlusal plane located in position , in which, from a medical point of view, the specified occlusal plane is located in the patient's mouth, to check, therefore, the state of contact between the patient's oral mucosa and the reference prosthesis or (2) the introduction of the reference prosthesis into an articulator having attached to a model of the patient's mouth to place the reference prosthesis in the proper position on an imaginary occlusal plane, considered as the occlusal plane, located in a position where the occlusal plane is medically assumed to be in of the patient's mouth, in order to check, therefore, the state of contact between the patient's mouth model and the reference prosthesis, selecting, in case of improper contact during use, a reference prosthesis having a different shape that does not allow improper contact or finely corrects the shape of the basis element the reference prosthesis in the reference prosthesis to prevent said contact; (C) a build and transfer step in which the curable prosthesis base material is built in the uncured state to form a corrective element on the mucosal facing surface of the reference prosthesis base element in the reference prosthesis determined for use in the reference prosthesis determination step, then placing the reference prosthesis having the curable prosthesis base material built on it in the proper position on the imaginary occlusal plane in the patient's oral cavity or articulator, and transferring the shape of the patient's oral mucosa or the shape of the patient's mouth model to the curable prosthesis base material, and simultaneously form the edge to remove excess curable material for the basis of the prosthesis; and (D) the step of curing the curable material for the base of the prosthesis, which has passed the stage of build-up and transfer, wherein step (C) of building and transferring includes: (C1) a central region build-up and transfer step of building up a curable prosthesis base material in an uncured state in the base region of the reference prosthesis base member and transferring the shape of the patient's mouth or the shape of the patient's mouth model; (C2) an anterior build-up and transfer step in which the curable denture base material is built up in the uncured state in the front denture base element base region of the reference prosthesis and the shape of the patient's mouth or the shape of the patient's mouth model is transferred and the curable base material is pulled out prosthesis in the uncured state from the boundary of the base with the formation of the edge; and (C3) a build-up and transfer step in the posterior region, in which the curable prosthesis base material is built in the uncured state in the back region of the base of the reference prosthesis base element and the shape of the patient's mouth or the shape of the model of the patient's mouth is transferred and the curable material for the prosthesis base is drawn out in the uncured state from the border of the base with the formation of the edge, wherein, after the center region build-up and transfer step, the front region build-up and transfer step and the rear region build-up and transfer step are performed simultaneously or separately. 7. The method of manufacturing a prosthesis according to claim 6, further comprising a correction step, in which, after completing the build-up and transfer step in the anterior region and the build-up and transfer step in the posterior region, a curable material for the base of the prosthesis in an uncured state is added to the surface of the side facing to the surface of the mucous membrane, the basis of the reference prosthesis to correct the shape of the surface on the side of the surface facing the mucous membrane.

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