JP2004202090A - False teeth with base containing metal member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To settle problems in conventional false teeth with full or partial base suitable for use in patients to whom dental implant operations are impossible, namely, to efficiently prevent bone absorption, improve troubles when users wear or remove the false teeth, or chew foods with it, protect buccal residual ridge/mucosa within the mouth and enhance the durability of false teeth. <P>SOLUTION: The false teeth have at least one false tooth 1 and a base 2 supporting it. The base 2 has a concave part to engage with the user's jaws and the concave face partially consists of a metal member 4. Because of the availability of a metal member, which is previously thought to have a weak combination with rubber materials, the durability of false teeth can increase as a whole. Further, it becomes possible to apply stimulating pressures or loads via the metal member 4 to the buccal residual ridge/mucosa in the mouth without pains, and this effectively prevents bone absorption caused before when the rubber material contacts the jaws and membranes. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to dentures (local dentures and full dentures), and in particular to dentures suitable for mounting on patients who cannot implant, and more specifically, the disadvantages of conventional dentures, In other words, it effectively prevents bone resorption, further improves the problems during wearing, detaching, and mastication of the user, and can effectively protect and apply the oral mucosa. About.
[0002]
[Prior art]
In general, the loss of teeth results in inadequate chewing during eating, which not only causes indigestion, but may even alter the appearance of the face. It is also said that teeth play an important role in satisfying one of the three major desires of humans, appetite, and even form a space that balances the skull and posture of the human body. I have. Thus, the loss of teeth can have various undesirable disadvantages. Thus, for example, dental implants (prosthetic roots), ie devices which are designed to be inserted by means of a surgical procedure into or on the maxilla and mandible to support the dental prosthesis superstructure, are implanted. Things are being developed.
However, dental implants can be implanted in patients, for example, when there are few jaw ridges in the oral cavity, when there is difficulty in hemostasis, when there is little saliva secretion, or when there is radiation damage due to oral cancer etc. It is considered impossible. If implant surgery is not possible in this way, instead of embedding the denture stabilizer directly into the patient's mucous membrane, use a denture that can be attached to and removed from the ridge of the wearer and that supports artificial teeth. It is suggested that:
[0003]
As described above, when the operation of the dental implant is impossible, many people use a denture with a denture (that is, dentures). Conventionally, artificial dentures that support artificial teeth with denture bases made of acrylic resin or the like have been used.However, because the denture base is hard, fine adjustment is difficult, and it may be inappropriate. Many disadvantages such as discomfort when chewing due to pain, disengagement when opening the mouth, pain during chewing and hygiene problems due to easy entry of food residue between denture base and oral mucosa And often hindered comfortable eating habits. Further, it has been considered that the denture base made of the hard acrylic resin gives too strong stimulation to the mucous membrane in the oral cavity, for example, the surface of the mandibular ridge.
Therefore, a denture structure has been developed that minimizes the burden on the ridges and mucosal surfaces of the denture base. Discloses a tooth device using a soft material as a soft backing material (for example, see Patent Document 1).
Further, in a dental molded article, by using a mixture of a methacrylic resin and a soft material, the durability of the denture base (methacrylic resin) and the soft material are improved by improving the adhesiveness (for example, , Patent Documents 2 and 3).
[0004]
However, in dentures in which the soft material is in direct contact with the oral ridge and mucous membrane, the bone resorption progresses due to the use of the dental ridge and mucous membrane because the irritation (pressure) to the ridge and mucous membrane is too low. A problem has arisen. As a result, it becomes difficult to chew not only hard foods but also soft foods, which may cause indigestion.
In addition, flexible materials often have problems in adhesiveness to various materials, and therefore, materials used in combination with these materials have been limited. For example, silicone rubber, which is a soft material, has low adhesiveness to metal, and it is difficult to use metal as a material for denture bases and the like, and further improvement in durability is required.
It should be noted that there is a further need to improve the feeling of wearing, the difficulty of detachment, the feeling of pressure, and the like, and the effective protection of the oral mucous membrane of general dentures.
[Patent Document 1]
JP 2000-287998 A
[Patent Document 2]
Japanese Patent Publication No. 7-2402
[Patent Document 3]
Japanese Patent Publication No. 7-53644
[0005]
[Problems to be solved by the invention]
The present invention has been achieved in order to solve the above-mentioned problems, and has been developed for a denture having a complete denture, that is, a full denture and a local denture, which are suitable for use in patients who cannot perform dental implant surgery. The problem in dentures, that is, preventing bone resorption efficiently, further improving the problems of wearing, putting on and taking off and mastication of the user, and effectively protecting the oral ridge and mucous membrane, The purpose is to increase the durability of the denture.
[0006]
[Means for Solving the Problems]
The present invention is based on the finding that the above problem can be overcome by introducing a metal member into a denture base in a specific form in a denture base.
That is, in the first aspect, the present invention relates to a denture having at least one artificial tooth and a denture base supporting the artificial tooth,
The dental prosthesis is characterized in that the denture base has a concave portion that engages with the ridge of the wearer, and a part of the concave surface is made of a metal member.
Further, the present invention, in the second aspect, is a denture having at least one artificial tooth and a denture base supporting the artificial tooth,
A first floor member made of an acrylic resin, in which the denture base directly contacts and supports a part of the surface of the artificial tooth, and an acrylic resin that directly contacts a part of the surface of the first floor member And a second floor member made of a mixture of a rubber material and a third floor member made of a rubber material, the third floor member supporting the first floor member through the second floor member, and having a recess for engaging a chin ridge of a wearer. Consisting of floor members,
A denture with a floor is provided, wherein a part of the concave surface is formed of a metal member.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
First, in the present specification, the term "covered denture" refers to a denture having a denture base directly in contact with the oral mucosa in order to artificially recover the functional and esthetic changes caused by the loss of one or more teeth. Means In addition, the denture includes both a denture for an upper jaw and a denture for a lower jaw.
"Artificial tooth" means a tooth artificially made as a substitute for a natural tooth. As the artificial teeth, for example, porcelain teeth, resin teeth, and in some cases, metal teeth and the like can be used. These can be created by anatomical and functional anatomical and functional resemblance to natural teeth, such as morphology, color, gloss, and size, in relation to missing or possibly remaining teeth. it can. In the present invention, the artificial tooth is not particularly limited as long as it has at least one artificial tooth. For example, it is preferable to have two or more artificial teeth, and more preferably, nine or more artificial teeth. And even more preferably 14 artificial teeth. These artificial teeth are preferably continuously adjacent to each other along the center line of the denture of the denture wearer. In the present invention, it is preferable to select an artificial tooth for an upper jaw when creating a denture for an upper jaw, and to select an artificial tooth for a lower jaw when creating a denture for a lower jaw. When a plurality of artificial teeth are used, their directions and intervals can be appropriately determined by a conventional method in consideration of the type, position, color tone, size, and the like of the artificial teeth required of the wearer.
[0008]
In the first aspect of the present invention, the “denture base” is a part of a denture having a denture that supports an artificial tooth by directly contacting the denture and can engage with the ridge and mucous membrane of a wearer (hereinafter, referred to as “denture base”). , And referred to as a ridge support engaging recess), and a part of the ridge support engaging recess surface is made of a metal member. Further, it is preferable that the denture base is formed by bonding an acrylic resin and a rubber-like substance. At this time, the acrylic resin and the rubber-like substance may be directly bonded and bonded to each other, but for example, both may be bonded and bonded using an adhesive such as a primer or a bonding liner.
In the first aspect of the present invention, a part of the concave portion for engaging the ridge of the denture base of the denture base is made of a metal member. Preferably, the metal member has one end in the denture base, and the other end has a shape constituting a part of the concave surface for jaw ridge engagement. Further, the metal member is preferably a metal selected from the group consisting of gold, silver, cobalt chromium alloy, gold alloy, silver alloy, gold / silver / palladium alloy, titanium, platinum alloy, nickel chromium alloy and stainless steel. Should be included.
[0009]
Hereinafter, the first embodiment of the present invention will be described more specifically with reference to the drawings, but the present invention is not limited thereto.
FIG. 1 shows a cross-sectional view of a denture with a denture according to the present invention. An artificial tooth 1 is supported by a denture base 2 directly contacting a part of its surface. The denture base 2 has a recess 3 for jaw ridge engagement. Part of the surface of the recess 3 for jaw ridge engagement is constituted by a part 6 of the metal member 4. The metal member 4 has one end 5 in the denture base 2, and the other end 6 is exposed from the jaw ridge engaging recess 3 to constitute a part of the surface of the denture engaging recess 3, that is, the denture base. From inside 2, it does not directly contact the artificial tooth 1, but extends opposite to the artificial tooth.
[0010]
Here, the shape and size of the other end 6 can be appropriately determined in consideration of the shape and size of the intraoral ridge and mucous membrane of the wearer. Further, it is preferable that the other end 6 is designed so as to directly contact the intraoral ridge and mucous membrane of the wearer, but it is preferable that the wearer does not feel pain through the other end 6. Desired. For this reason, for example, the shape of the other end portion 6 of the metal member that directly contacts the intraoral ridge / mucous membrane of the wearer is appropriately adjusted in consideration of the shape and size of the orbital ridge / mucous membrane of the wearer. Then, for example, a curved surface as shown in FIG. 1 and / or the distance from one end 5 to the other end 6 of the metal member (hereinafter referred to as “length of the metal member”) is adjusted. May be required. Incidentally, by adjusting the length of the metal member, for example, the denture of the present invention can have the cross section shown in FIG.
The distance extending in the direction perpendicular to the direction of the "length of the metal member" (hereinafter referred to as "thickness of the metal member") is required for the durability of the entire denture or the denture base layer and the wearer. It can be appropriately set in consideration of the size of the denture, the type of metal used, and the like. More specifically, the “length of the metal member” can be, for example, up to 6 mm, and is preferably, for example, 1 to 5 mm. On the other hand, the “thickness of the metal member” can be, for example, 2 to 6 mm, and is preferably 3 to 5 mm. The “length of the metal member” and the “thickness of the metal member” are appropriately determined according to the type of artificial tooth used, the type of metal used, the size of the denture required for the wearer, the size of the ridge, and the like. It is preferable to set, but it does not essentially vary depending on the number of artificial teeth and the like.
FIG. 7 shows an overall view of the metal member 4 in the case of the embodiment shown in FIG.
[0011]
Further, in the second aspect of the present invention, the “denture base” directly supports at least three layers of the first floor member, the second floor member, and the third floor member, that is, a part of the surface of the artificial tooth. A first floor member made of an acrylic resin, and a second floor member made of a mixture of an acrylic resin and a rubber-like substance, which directly contacts a part of the surface of the first floor member, and a second floor member. And a third floor member made of a rubber-like substance and having a concave portion for engaging the chin ridge of the wearer, supporting the first floor member through the third floor member. Here, a so-called backing layer may be further provided to the recess for engaging the ridge and / or a so-called stabilizing agent may be applied. Alternatively, the ridge may be fixed using a clasp. Is preferably in direct contact with and engaged with the intraoral ridge / mucosa of the wearer, thereby stabilizing the denture of the present invention on the ridge / mucosa of the wearer.
[0012]
As the acrylic resin constituting the first floor member, any acrylic resin for denture base, in particular, any resin that is generally commercially available as a heat-polymerizable resin of a powder-liquid mixture type can be used. Specifically, the acrylic resin includes a methacrylic resin. Specific examples of these include polymethyl methacrylate and methyl methacrylate. In addition, the acrylic resin may contain a small amount of various additives, for example, a crosslinking agent such as ethyl dimethacrylate (EDMA), a pigment such as iron sesquioxide (silver) and titanium oxide, and a polymerization catalyst such as benzoyl peroxide and hydroquinone. May be included. Further, the polymethyl methacrylate mentioned as the above example may be a homopolymer having methyl methacrylate as a monomer, but other monomers such as vinyl monomers, for example, alkyl acrylate (for example, methyl acrylate), other than methyl methacrylate It may be an alkyl methacrylate or a copolymer with ethylene glycol dimethacrylate. The ratio of these monomers is determined in consideration of the operability at the time of making the denture, or in consideration of the properties of the denture base, such as bending strength, bending elastic modulus, bending deflection, water absorption, mechanical strength, plasticity and dissolution. It is better to determine as appropriate.
The amount of the first floor member to be used can be appropriately determined in consideration of the number of artificial teeth, the size required for a denture, and the like. 7 g, and when the number of artificial teeth is 14, it can be 8 to 10 g.
The types and amounts of these acrylic resins can be the same for the acrylic resins that can be used in the first embodiment.
[0013]
The second floor member is made of a mixture of the acrylic resin and a rubber-like substance. This mixture is preferably determined so that the ratio of the acrylic resin to the rubber-like substance is, for example, from 1: 9 to 9: 1, preferably from 2: 8 to 8: 2 by mass. The mixing (kneading) of the acrylic resin and the rubber-like substance is preferably performed, for example, on a kneaded paper using a spatula until both are uniformly mixed. By the mixing ratio and / or mixing operation as described above, the adhesion between the second floor member (a mixture of an acrylic resin and a rubber-like substance) and the first floor member (acrylic resin), and the second floor member Both the adhesiveness to the third floor member (rubber-like substance) can be improved. Further, the adhesiveness when the second floor member and the metal member are in contact with each other may be considered.
The usage amount of the second floor member can be appropriately determined in consideration of the number of artificial teeth, the size required for a denture, and the like. The weight can be 15 g, and when the number of artificial teeth is 14, the weight can be 1 to 2 g.
In the same manner, in the first embodiment, the acrylic resin and the rubber-like substance can be bonded.
[0014]
The third floor member in the present invention is made of a rubber-like substance. The third floor member supports the first floor member via the second floor member. That is, the third floor member supports the first floor member via the second floor member, rather than directly contacting the first floor member. This is in consideration of good adhesion of the third floor member to the second floor member, but changes within a range in which the desired adhesion is obtained, for example, the third floor member and the second floor member This does not preclude changes to settings where one floor member makes direct contact at a low level.
Further, the third floor member has a recess for engaging the ridge. The denture with a floor of the present invention has such a concave portion for engaging the ridge on the third floor member, so that the fit of the wearer to the ridge can be improved. Less likely to cause pain due to direct contact. It is preferable that such a recess for engaging the ridge is appropriately adjusted in consideration of the size and shape of the ridge of the wearer, and such adjustment is performed by a conventional method, for example, in the mouth of the wearer. After performing a series of functional movements after insertion, sufficient occlusion at the central occlusal position, taking out from the oral cavity, it can be performed by adjusting the peripheral form using scissors, a knife or the like. Note that a part of the concave surface for jaw ridge engagement is made of a metal member.
[0015]
As the rubber-like substance, it is preferable to select a substance having high biocompatibility. For example, a silicone rubber, more specifically, an addition-curable silicone rubber (for example, a diorganopolysiloxane capped at both ends with a vinyl group) , Organohydrophenpolysiloxane, etc.), radical reaction-curable silicone rubber (for example, vinyl-containing diorganopolysiloxane, etc.), condensation reaction-curable silicone rubber, and the like. Further, the third floor member may be made of one kind of rubbery substance, or may be made of two or more kinds of rubbery substance. In addition, the rubber material of the third floor member has a hardness to obtain desired characteristics, for example, 10 to 80 in JIS-A hardness, particularly 20 to 80 in JIS-K6301, or 20 to 70 in JIS-K6301 in particular. Preferably it has from 30 to 50. The properties of the rubber-like substance, such as tensile strength, compression elastic modulus, water absorption, and dissolution rate, can be appropriately set in consideration of the properties required for the obtained third floor member. In addition, the third floor member may include a coloring agent for making the appearance similar to the gum, or may include other various additives such as a filler. In the present invention, as the rubber material for the third floor member, for example, trade name CF5005 manufactured by Dow Corning Toray Silicone Co., Ltd. and KE-1950-70 (AB) manufactured by Shin-Etsu Chemical Co., Ltd. Can be used.
The amount of the third floor member to be used can be appropriately determined in consideration of the number of artificial teeth, the size required for a denture, and the like. The weight can be 0 g, and when the number of artificial teeth is 14, the weight can be 10 to 15 g.
The types and amounts of these rubber-like substances can be the same for the rubber-like substances that can be used in the first embodiment.
[0016]
Further, in the second aspect, the “metal member” is a member made of metal and constitutes a part of the concave surface for jaw ridge engagement. Preferably, the metal member has one end in the first floor member, and the other end has a shape that constitutes a part of the concave surface for jaw ridge engagement. Thus, in one embodiment, for example, the metal member having such a shape can reinforce the entire denture of the present invention, in particular, the denture base composed of the three-member member.
Hereinafter, the second embodiment of the present invention will be described more specifically with reference to the drawings, but the present invention is not limited thereto. FIG. 3 shows a cross-sectional view of the denture of the present invention. The artificial tooth 1 is supported by the first floor member 7 directly contacting a part of the surface. The second floor member 8 directly contacts a part of the surface of the first floor member 7. The third floor member 9 supports the first floor member 7 via the second floor member 8, and has the recess 3 for jaw ridge engagement. The metal member 4 has one end 5 in the first floor member 7, extends opposite to the artificial tooth 1, and the other end 6 is exposed from the recess 3 for jaw ridge engagement. Make up the part. The metal member 4 penetrates the second member 8. In addition, it can be said that the metal member 4 also penetrates the second member 8 in the embodiment of FIG. Further, the recess for engaging the ridge may be configured as shown in FIG. 5, that is, may be constituted by the metal member 4, the first member 7, the second member 8 and the third member 9. Good.
The metal member 4 can have the same material, shape, and size as described in the first embodiment.
[0017]
When the denture has at least two artificial teeth in common with the first embodiment and the second embodiment, the metal member moves along the center line 10 of the wearer's ridge, for example, as shown in FIG. Preferably, it extends. The distance that the metal member extends along the centerline 10 of the ridge (hereinafter, referred to as the “width of the metal member”) depends on the number of artificial teeth to be used, for example, whether a denture to be created is a local denture or an entire denture. It varies depending on whether it is a denture, and furthermore, it varies depending on the size of the denture required for the wearer or the type and size of the artificial tooth to be used. When preparing a local denture having one artificial tooth, the width of the metal member can be, for example, 2 to 10 mm, and preferably 4 to 6 mm. On the other hand, in the case where 14 artificial dentures are formed as a complete denture, the width of the metal member can be, for example, 7 to 15 cm, and preferably 8 to 12 cm. Further, it is preferable that the metal member is not exposed from the denture base in the width direction of the metal member at the distal end 11 of the ridge. Preferably, the metal member is not exposed from the denture base in the thickness direction.
ADVANTAGE OF THE INVENTION According to this invention, it can be used as a reinforcing member in a denture base even if it is a metal member which was conventionally difficult to adhere | attach with a rubber-like substance, especially a silicone rubber.
In addition, the cross section along the transverse line 12 in FIG. 6 corresponds to FIGS. 1 to 5 and FIGS.
[0018]
In addition, when the denture of the present invention is a denture for an upper jaw, for example, as shown in FIG. 8, the metal member 4 is integrated with a metal member made of a thin metal plate 13 that covers the upper palate. Is preferred. Further, in the present invention, the metal member may have a mesh portion 14 as shown in FIG. The porosity and shape of the mesh portion 14 can be appropriately determined in consideration of the adhesiveness between the denture base, particularly, the first floor member and the second floor member. FIG. 9 is a cross-sectional view of a denture with a floor when the metal member shown in FIG. 8 is used. At this time, the size and form of the thin metal plate 13 of the metal member can be appropriately determined so as to cover the entire upper palate of the wearer. For example, the thickness of the thin metal plate 13 can be, for example, 1.0 to 2.5 mm, and preferably 1.5 to 2.0 mm. In the present invention, in the maxillary denture, the desired strength is achieved and the tongue can be easily moved even if the thickness of the thin metal plate 13 as a member for covering the upper palate portion is made as thin as the above. Further, the feeling of pressure on the upper jaw can be reduced. Further, the feeling of wearing is improved as compared with the conventional nonmetallic member. In addition, when eating hot food, it is possible to sufficiently feel the warmth of the upper palate through the thin metal plate.
[0019]
Further, the present invention also includes the embodiments shown in FIGS. More specifically, FIG. 10 is a cross-sectional view of a maxillary floor denture when a metal member having the mesh portion 14 is used. In FIG. 10, the mesh portion 14 of the metal member directly contacts the first floor member 7. The second floor member 8 directly contacts the other side of the mesh member 14 and a part of the first floor member. The mesh member 14 can receive the pressure applied in the vicinity of the ridge center line via the second floor member 8. In FIG. 10, since the mesh portion 14 receives the pressure through the thin second floor member without the ridge and mucous membrane of the wearer coming into direct contact with the metal member, the mesh portion 14 does not cause pain to the wearer and furthermore, A pressure that can prevent the progress of absorption can be applied.
On the other hand, FIG. 11 is a cross-sectional view of a denture with a lower jaw when a metal member having the mesh portion 14 is used. In FIG. 11, the metal member has the other end 6 which constitutes a part of the recess for engaging the ridge, and a mesh portion 14 extending between the first floor member and the second floor member.
[0020]
Hereinafter, an example of the method for manufacturing a denture with a bed of the present invention will be described.
(Preparation of mandibular dentures)
First, a paraffin wax having a predetermined shape and dimensions is formed by molding a form in the mouth of the wearer. On top of that, a predetermined number of artificial teeth are arranged along the center line of the ridge, for example, in the case of a complete denture, to create a prototype of a denture. This is buried in gypsum in a predetermined container, for example, a dental bottle flask so as to be buried from artificial teeth, and then the gypsum is hardened. Thereafter, the mixture is heated by a conventional method to remove the melted paraffin wax, thereby obtaining a gypsum split mold in which artificial teeth are arranged in gypsum.
In consideration of the number of artificial teeth and the like, 0.5 to 10 g of a paste-form acrylic resin is filled so that the artificial teeth are directly in contact with a part of the artificial teeth in the gypsum split mold cavity. On this, a metal member having the above-described form (having no thin metal plate) extends from inside the acrylic resin to face the artificial tooth without directly contacting the artificial tooth, and Install along the center line of the ridge.
[0021]
Next, in consideration of the number of artificial teeth and the like, the acrylic resin and the rubber-like substance are mixed (kneaded) on a mixing paper at a mass ratio described above using a spatula. The mixture (kneaded material) is filled so as to directly cover the entire surface of the acrylic resin exposed in the recess. Thereafter, 0.7 to 15 g of the rubber-like substance is directly covered on the entire surface of the mixture (kneaded material) exposed in the depression. At this time, the metal member covers the length direction of the metal member extending to face the artificial tooth, but the above-mentioned ridge / mucosa contact portion is exposed (for example, see FIG. 1). This is heated in a pressure cooker for 20-30 minutes.
After cooling, it is removed from the gypsum and ground (burr removed) using a polishing bar or the like. Next, the surface of the denture is finished using alumina oxide and a coating material. This is inserted into the mouth of the wearer, fully occluded at the central occlusal position, and after performing a series of functional movements, removed from the oral cavity, trimmed with scissors or a knife, etc. Thus, it is possible to obtain an artificial denture for use (see FIG. 12 as an example).
[0022]
(Preparation of denture for upper jaw)
The upper denture for the upper jaw (FIG. 13) can be manufactured in the same manner as the method for preparing the lower denture for the lower jaw, but uses a metal member as shown in FIG. Specifically, after filling the acrylic resin, the metal member as shown in FIG. 8 is operated in the same manner as the mandibular denture, and is not directly in contact with the artificial teeth. Place it so that it extends opposite the teeth and along the center of the chin base.
[0023]
【The invention's effect】
According to the present invention, a metal that has been conventionally considered to have a weak binding property with a rubber-like substance can be used as a member, and thus reinforcement for improving the durability of the entire denture can be performed. In addition, it is possible to apply a stimulus (pressure), that is, a load to the intraoral ridge and mucous membrane of the wearer through the metal member of the present invention to such an extent that pain does not occur. It is possible to efficiently prevent bone resorption that occurs when the substance contacts the ridge and mucous membrane. Since bone resorption can be prevented, pain can be suppressed as much as possible, so that not only soft foods but also hard foods can be easily chewed, and indigestion can be efficiently prevented.
In addition, in the maxillary denture, metal can be used as a member to be attached to the maxillary palate, so that the thickness of such a member can be made thinner than before, the tongue can easily move, and a feeling of pressure on the upper jaw can be obtained. Can be reduced. Furthermore, when eating hot food, the upper palate can be sufficiently felt warm through the metal member. It is possible to provide a denture with a denture that does not cause denture stomatitis even when worn for a long period of time.
Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited to the following Examples.
[0024]
【Example】
Example 1 (Preparation of mandibular denture)
First, 14 artificial teeth were placed along the center line of the jaw ridge and supported on paraffin wax having a predetermined shape and dimensions created by molding the form in the mouth of the wearer. Prototype was created. This was buried in a gypsum placed in a dental bottle flask by embedding it from artificial teeth, and then the gypsum was hardened. Thereafter, the bottle flask was closed and heated. Next, the bottle-type flask was opened, and the melted paraffin wax in the hollow was removed to obtain a gypsum split mold in which artificial teeth were arranged in gypsum.
The paste was filled with 8 g of an acrylic resin paste (manufactured by GC Co., Ltd., trade name: GC Acron) so as to directly contact the surface of the artificial tooth exposed in the cavity. On this, the metal member shown in FIG. 7 was installed. This metal member is made of a cobalt chromium alloy. One end of the metal member was placed in the acrylic resin, facing the artificial tooth, and extending along the center of the ridge, without directly contacting the artificial tooth. The metal member had a length of 1 mm, a thickness of 4 mm, and a width of 12 cm. In addition, the ridge / mucosa contact portion and the maxillary palate contact portion of the metal member were adjusted in advance to match the shape and size of the wearer's ridge / mucosa and maxillary palate.
[0025]
Next, 2 g of the acrylic resin and 8 g of paste-form addition type silicone rubber (trade name: KE-1950-70 (AB)) manufactured by Shin-Etsu Chemical Co., Ltd. were mixed on a kneaded paper using a spatula (mixing). did. 1 g of this mixture (kneaded material) was filled so as to directly cover the entire surface of the acrylic resin exposed in the recess. Thereafter, 10 g of the silicone rubber is directly covered on the entire surface of the mixture (kneaded material) exposed from the inside of the cavity and on the metal member portion extending opposite to the artificial tooth. It was filled so that the portion was exposed. In addition, a concave portion that is engaged with the wearer's ridge and mucous membrane was made of silicone rubber so that a part of the recess was constituted by the surface of the metal member that touched the ridge and mucous membrane (see FIG. 1). . This was heated in a pressure cooker for 20 minutes.
After cooling, it was taken out of the gypsum and ground (burr removal) using a polishing bar. Next, the denture surface was finished using alumina oxide and a coating material.
Insert into the oral cavity of the wearer, fully occlude at the central occlusal position, perform a series of functional movements, remove from the oral cavity, adjust the marginal shape using scissors, a knife, etc., and use the floor for the lower jaw A denture (FIG. 12) was obtained.
[0026]
Example 2 (Preparation of a denture for upper jaw)
Using the metal member shown in FIG. 8 (same as FIG. 7 except having a thin metal plate 13 having a thickness of 2.0 mm), this is operated in the same manner as the mandibular denture, and is in direct contact with the artificial tooth Instead, the upper denture for the upper jaw was prepared by the same operation as in Example 1 except that it was installed so as to extend from inside the acrylic resin to face the artificial teeth and to extend along the center line of the ridge. 13) was obtained.
[0027]
Example 3 (performance evaluation)
The following results were obtained when the lower denture for the lower jaw and the denture for the upper jaw created in Examples 1 and 2 were actually used for a wearer who needs a complete denture.
(1) The metal plate attached to the upper palate was thin, and the tongue was easy to move. There was no feeling of pressure on the upper jaw.
(2) Both the upper denture and the lower denture had good wearing feeling. In particular, regarding the upper denture, the feeling of wearing was remarkably good as compared with the case where a conventional nonmetallic (soft) lining material was used for the palate.
(3) The denture for the upper jaw had less peeling off compared to the case where the conventional nonmetallic (soft) lining material was used for the palate.
(4) Even if the mouth was wide open, it was difficult to come off.
(5) When eating hot food, the warmth was sufficiently felt in the upper palate via the metal plate.
(6) During chewing, food residue was not easily interposed between the denture and the oral mucosa, and no pain was felt. Even hard foods (rice crackers) could be chewed without pain.
(7) Denture stomatitis did not occur 30 days after wearing.
(8) After 180 days from the wearing, no bone resorption occurred, the feeling of wearing was still good, and no pain was caused even when biting.
[Brief description of the drawings]
FIG. 1 shows one embodiment of a cross-sectional view of a denture with a denture of the present invention.
FIG. 2 shows one embodiment of a cross-sectional view of a denture with a denture of the present invention.
FIG. 3 shows an embodiment of a cross-sectional view of a denture with a denture of the present invention.
FIG. 4 shows an embodiment of a cross-sectional view of a denture with a denture of the present invention.
FIG. 5 shows one embodiment of a cross-sectional view of the denture with a denture of the present invention.
FIG. 6 shows the center line of the ridge.
FIG. 7 shows a metal member that can be used in the present invention.
FIG. 8 shows a metal member that can be used when manufacturing an upper denture in the present invention.
9 shows an embodiment of a cross-sectional view of the upper denture with a maxillary prosthesis of the present invention manufactured using the metal member shown in FIG.
FIG. 10 shows an example of a cross-sectional view of an upper denture with a maxillary prosthesis according to the present invention.
FIG. 11 shows an example of a cross-sectional view of the mandibular denture according to the present invention.
FIG. 12 shows a denture with a lower denture (completed view) according to the present invention.
FIG. 13 shows a denture with a maxillary denture (completed view) according to the present invention.
[Explanation of symbols]
1 artificial teeth
2 denture base
3 Denture engaging recess for denture base
4 Metal members
5 One end of metal member
6 The other end of the metal member
7 First member
8 Second member
9 Third member
10 Centerline of the ridge
11 End of jaw ridge
12 Crossing Line
13 Thin metal plate
14 mesh part

Claims (8)

A denture having at least one artificial tooth and a denture base supporting the artificial tooth,
The denture with a denture, wherein the denture base has a concave portion that engages with the ridge of the wearer, and a part of the concave surface is made of a metal member. The denture according to claim 1, wherein the denture base is formed by bonding an acrylic resin and a rubber-like substance. The denture according to claim 1, wherein the metal member has one end in the denture base, and the other end has a shape forming a part of the concave surface. 2. The metal member includes a metal selected from the group consisting of gold, silver, cobalt chromium alloy, gold alloy, silver alloy, gold / silver / palladium alloy, titanium, platinum alloy, nickel chromium alloy and stainless steel. 4. The denture according to any one of claims 1 to 3. The denture according to any one of claims 1 to 4, wherein the denture is an upper denture, wherein the metal member is integrated with a metal member made of a thin metal plate that covers the upper palate. A denture having at least one artificial tooth and a denture base supporting the artificial tooth,
A first floor member made of an acrylic resin, in which the denture base directly contacts and supports a part of the surface of the artificial tooth, and an acrylic resin that directly contacts a part of the surface of the first floor member And a second floor member made of a mixture of a rubber material and a third floor member made of a rubber material, the third floor member supporting the first floor member through the second floor member, and having a recess for engaging a chin ridge of a wearer. Consisting of floor members,
A denture with a floor, wherein a part of the concave surface is made of a metal member. The denture according to claim 6, wherein the metal member has one end in the first denture base, and the other end has a shape forming a part of the concave surface. The denture according to claim 6 or 7, wherein the metal member has a mesh portion located between the first member and the second member.

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