KR102590346B1 - manufacturing method of digital overdenture - Google Patents

Abstract

To improve tooth restoration precision, the present invention includes a first step of setting a virtual temporary denture with a virtual insertion groove; A second step of manufacturing temporary dentures having temporary insertion grooves corresponding to the virtual insertion grooves; A third step in which the attachment is fastened to the upper side of the fixture installed in the target arch, and a protection cap is fastened to the top of the attachment; A virtual overdenture base with a virtual embedding portion set is created based on a correction scanning image of the temporary denture in which the temporary insertion groove is corrected to a correction groove, and the virtual overdenture base is transmitted to the manufacturing device and transmitted to the virtual embedding portion. A fourth step in which an overdenture base on which a corresponding embedded portion is formed is manufactured; and a fifth step in which the housing cap is attached and fixed to one side of the embedded portion to finally manufacture the digital overdenture.

Description

Manufacturing method of digital overdenture {manufacturing method of digital overdenture}

The present invention relates to a method of manufacturing a digital overdenture, and more specifically, to a method of manufacturing a digital overdenture that improves tooth restoration precision.

In general, dentures or prosthetics are artificial periodontal tissues in the oral cavity that replace missing natural teeth and artificially restore their appearance and function. At this time, the denture or prosthesis can be installed inside the oral cavity to restore masticatory function and prevent deformation of periodontal tissue. The dentures or prosthetics can be divided into partial/complete dentures and partial/complete prosthesis depending on the number of missing teeth.

Meanwhile, the denture is installed by applying dental adhesive to its inner molding groove and adhering to the surface of the gums, and direct occlusal pressure is applied to the gums. Because of this, there was a problem of causing a foreign body sensation and pain in patients using the dentures. On the other hand, since the prosthesis is fixed to a fixture installed in the alveolar bone, the sensation of a foreign body in the gums and pain caused by occlusal pressure can be reduced. However, there was a problem in that the prosthesis was substantially permanently fixed to the oral cavity, making maintenance such as cleaning difficult. Accordingly, an overdenture that compensates for the shortcomings of the denture and the prosthesis has been disclosed.

In detail, the overdenture, like the prosthesis, is fixed to a fixture implanted in the alveolar bone and is detachable from the oral cavity like the denture, making it easy to maintain, such as cleaning. At this time, the overdenture includes a coupling means that is selectively coupled to the abutment/attachment fixed to the fixture.

Here, the coupling means is provided as a bar type that passes through a plurality of abutments, or is provided as a cap type that individually matches the plurality of attachments.

In detail, the bar-type coupling means is formed as a bent bar bent to be disposed entirely along the patient's dental arch, and the abutment is formed with an insertion portion to which the bar-type coupling means is fastened. And, on the inner surface of the overdenture, a holder insertion portion into which the bending bar and the upper end of the abutment are simultaneously inserted is formed in a groove shape. In this way, the bar-type coupling means has the advantage of being easy to install because it is simultaneously fastened to a plurality of the abutments.

However, the volume of the upper end of the abutment protruding above the gum increases so that the bar-type coupling means is fastened. In addition, the thickness and height of the artificial gum portion must be formed to be large so that the abutment and the bending bar protruding above the gum can be inserted into the overdenture as a whole. As a result, the overall height of the overdenture increases, making it difficult to manufacture the overdenture to fit the patient's vertical diameter. In addition, in order to manufacture the overdenture to fit the patient's vertical diameter, the size of the artificial tooth portion fixed to the artificial gum portion is relatively small, so there is a problem in that aesthetics are deteriorated.

Meanwhile, the cap-type coupling means is provided as a fitting type or a magnetic attachment type for the plurality of attachments. At this time, the cap-type coupling means is inserted into the embedded groove formed on the inner surface of the artificial gum part, and is attached and fixed through curable resin.

Here, in the related art, after manufacturing the overdenture, the embedment groove was processed by predicting the location where the overdenture would be installed in the oral cavity and the installation location of the fixture. Because of this, there was a problem in that the installation position of the fixture and the cap-type coupling means attached and fixed to the buried groove were not accurate and the positional deviation was large. Accordingly, some attempted to overcome the positional deviation by increasing the diameter of the buried groove.

However, when the diameter of the buried groove is greatly expanded, the thickness of the temporary gum portion becomes thinner and its strength becomes weaker. Because of this, there was a problem in that the temporary gum portion was fractured during the occlusal process to adjust the installation position of the overdenture. Additionally, as the amount of the curable resin injected increases, there is a problem in that the time required to cure it increases. Moreover, when the overdenture flows before the curable resin is hardened, there is a problem in that positional accuracy is deteriorated.

Korean Patent No. 10-1409084

In order to solve the above problems, the present invention aims to provide a method of manufacturing a digital overdenture with improved tooth restoration precision.

In order to solve the above problem, the present invention is a housing cap fixed on the inner side to be detachably installed in the oral cavity through an attachment that is fixed to the target arch and has a locking protrusion protruding in the radial outer direction of the upper outer circumference and is formed to be stepped from the lower side. A method of manufacturing a digital overdenture, comprising: a first step of setting a virtual temporary denture with a virtual insertion groove set at a position corresponding to placement information in which image information about the oral cavity is set in a virtual integrated planning image through a planning unit; A second step in which the virtual temporary denture is transmitted to a manufacturing device to manufacture a temporary denture having a temporary insertion groove corresponding to the virtual insertion groove; A third step in which the attachment is fastened to the upper side of the fixture installed in the target arch according to the installation information, and a protection cap is coupled to the top of the attachment to shield the blocking protrusion; A virtual embedding part exceeding the volume of the housing cap is set based on a correction scanning image obtained through an imaging device and loaded into the planning unit for the temporary denture in which the temporary insertion groove is corrected with a correction groove corresponding to the protection cap. A fourth step in which a virtual overdenture base is created, and the virtual overdenture base is transmitted to the manufacturing device to manufacture an overdenture base including an artificial tooth portion and an artificial gum portion on which an embedded portion corresponding to the virtual embedded portion is formed; and a fifth step in which the housing cap is attached and fixed to one side of the embedded portion to finally manufacture the digital overdenture.

Through the above solutions, the present invention provides the following effects.

First, as the protective cap is combined to shield the undercut structure formed at the top of the attachment, the problem of relining resin flowing in and getting stuck during the correction process of the temporary denture is eliminated, so when separating the temporary denture with the correction groove formed, traction force is applied to the fixture. By preventing it from flowing while falling, the placement precision can be significantly improved.

Second, the top of the protective cap is provided with a continuous cross-sectional area in the longitudinal direction, giving the attachment a healing function, so the attachment can be fixed immediately after the fixture is installed, simplifying the number of dental visits and surgical procedures for patients, and improving the alveolar bone and Contamination and damage to the top of the attachment can be prevented during the gum healing period.

Third, as the outer circumference of the protective cap corresponds to the outer diameter of the housing cap, the matching between the correction groove image displayed on the correction scanning image of the temporary denture and the virtual housing cap selected and extracted from the digital library is improved, allowing the design information of the embedded groove to be precise. Therefore, the installation precision of the digital overdenture in the oral cavity can be significantly improved.

Fourth, as the vent hole is formed from the embedded groove to one side of the artificial gum part, there is no need to form a hole in the artificial tooth part for injection or removal of the curable resin, so the durability of the artificial tooth part can be significantly improved, and the curable resin is added to the housing cap. It can be discharged through the opening side and prevented from flowing in between the attachment and the housing cap.

1 is a flowchart of a method for manufacturing a digital overdenture according to an embodiment of the present invention.
Figure 2 is a block diagram of a digital overdenture manufacturing system according to an embodiment of the present invention.
Figure 3 is an example diagram showing a planning image in the manufacturing method of a digital overdenture according to an embodiment of the present invention.
Figure 4 is an exemplary view showing the inner surface of a temporary denture in the method of manufacturing a digital overdenture according to an embodiment of the present invention.
Figure 5 is an example diagram showing the correction process of a temporary denture in the manufacturing method of a digital overdenture according to an embodiment of the present invention.
Figure 6 is an exemplary diagram showing an attachment device applied to the manufacturing method of a digital overdenture according to an embodiment of the present invention.
Figure 7 is an exemplary view of the protection cap according to an embodiment of the present invention viewed from the top.
Figures 8a and 8b are illustrations showing modifications of the protect cap applied to the manufacturing method of the digital overdenture according to an embodiment of the present invention.
Figure 9 is an example diagram showing the creation process of a virtual overdenture base in the manufacturing method of a digital overdenture according to an embodiment of the present invention.
Figures 10a and 10b are exemplary views showing the manufacturing process of the final digital overdenture in the manufacturing method of the digital overdenture according to an embodiment of the present invention.

Hereinafter, a method of manufacturing a digital overdenture according to a preferred embodiment of the present invention will be described in detail with reference to the attached drawings. At this time, hereinafter, it is preferable to understand that the upper side is a direction corresponding to the occlusal surface of the teeth based on the upper jaw, and the lower side is a direction corresponding to the tooth root side based on the upper jaw.

FIG. 1 is a flowchart of a method for manufacturing a digital overdenture according to an embodiment of the present invention, and FIG. 2 is a block diagram of a digital overdenture manufacturing system according to an embodiment of the present invention.

Referring to Figure 1, the method of manufacturing a digital overdenture according to the present invention includes setting a virtual temporary denture (1010), manufacturing a temporary denture (1020), correcting a temporary denture (1030), manufacturing an overdenture base (1040), and attaching a housing cap. It includes a series of steps such as fixation (1050).

At this time, the digital overdenture, which will be described below, is a dental restoration designed and manufactured to suit the oral environment of each patient, and is detachably installed in the target dental arch. In detail, a housing cap is fixed to the inner surface of the digital overdenture, and an attachment to which the housing cap is selectively coupled is fixed to the target arch.

At this time, the attachment is fixed to the upper end of the fixture installed in the target arch, and a locking protrusion protrudes in a radial outer direction around the upper outer periphery of the attachment. Accordingly, a step groove that is stepped from the locking protrusion may be formed on the lower side of the locking protrusion in an undercut structure. Additionally, a restraining protrusion on which the locking protrusion is caught may protrude in a radial inward direction on the inner periphery of the housing cap. Accordingly, the housing cap and the attachment can be fixed to each other through the combination of the locking protrusion and the restraining protrusion.

Here, the target arch is preferably understood as the dental jaw requiring the digital overdenture, and in the present invention, it is explained and illustrated as the upper jaw, which is an edentulous jaw. In addition, the opposing arch, which will be described later, is preferably understood as the dental jaw that occludes with the target arch, and in the present invention, it is explained and shown as the lower jaw, which is a dentulous jaw. Of course, in some cases, the present invention can be equally applied to the manufacturing process of a digital overdenture installed when the lower jaw or both upper and lower jaw are edentulous.

In addition, it is desirable to understand that the temporary denture is a denture that is first manufactured to obtain precise design information for the digital overdenture. In addition, since the temporary denture can be temporarily used by the patient during the manufacturing period of the digital overdenture, usability and convenience in the tooth restoration process can be significantly improved.

Referring to FIG. 2, the method of manufacturing the digital overdenture may be performed through a digital overdenture manufacturing system 200 including an imaging device 201, a planning unit 202, and a manufacturing device 203.

In detail, the imaging device 201 is used to acquire surface information (m2, m3) and alveolar bone information (m7) about the target arch and the opposing arch. It is desirable that the imaging device 201 be understood as a concept encompassing a dental scanner and a CT imaging device. That is, surface information (m2, m3) about the outer surface of the target arch and the opposing arch can be obtained as a three-dimensional image using the dental scanner. In addition, surface information (m2, m3) of the temporary denture 60 can be obtained as a three-dimensional image using the dental scanner. At this time, the dental scanner may include a mobile scanner that is easy to use in the oral cavity and a fixed scanner that can accurately scan the temporary denture 60. In addition, using the CT imaging device, alveolar bone information (m7) that can confirm the shape and curvature of the alveolar bone (1) and the position of the inferior alveolar nerve can be obtained as a three-dimensional image and cross-sectional image.

The planning unit 202 is preferably understood as a calculation unit of a computer device that collects, calculates, and models image information acquired through the imaging device 201 and digital information previously stored in the digital library 204, which will be described later. That is, the image information acquired through the imaging device 201 is loaded into the planning unit 202, and the image information is displayed on a display connected to the planning unit 202. Then, the image information is virtually aligned corresponding to the preset vertical height. Accordingly, a planning image (m1) can be generated for establishing an overall tooth restoration plan and designing the digital overdenture 300.

Here, it is desirable to understand that the digital library 204 is a database in which basic external appearance information of components used for tooth restoration is stored as three-dimensional vector data. In detail, the digital library 204 may store a plurality of three-dimensional external appearance information about the physical abutment and the physical attachment device 50, which will be described later. In addition, the digital library 204 may also store three-dimensional external shape information for designing the temporary denture 60 and the digital overdenture 300. This digital library 204 is connected to the planning unit 202 through wired and wireless communication, and information previously stored in the digital library 204 can be selectively extracted and loaded into the planning unit 202. Alternatively, the digital library 204 may be provided as a storage included in the planning unit 202.

The manufacturing device 203 is understood as a device for manufacturing the temporary denture 60 or the digital overdenture 300 corresponding to the design information of the temporary denture 60 or the design information of the digital overdenture 300. This is desirable. The manufacturing device 203 may be equipped with a 3D printer, dental CNC, or mold device.

Figure 3 is an exemplary diagram showing a planning image in the method of manufacturing a digital overdenture according to an embodiment of the present invention.

Referring to Figures 2 and 3, the planning image (m1) is preferably generated based on image information about the patient's oral cavity.

In detail, the three-dimensional surface information (m2, m3) and the alveolar bone information (m7) of the target arch and the opposing arch are loaded into the planning unit 202 and displayed as a three-dimensional image. Then, the planning image (m1) can be generated as the three-dimensional surface information (m2, m3) and the alveolar bone information (m7) are virtually aligned to correspond to a preset vertical dimension (occlusal vertical dimension, VD). At this time, it is preferable that the planning image (m1) is set with a plurality of placement information (m8) of the fixture (8) spaced apart from each other along the dental arch line.

Also, it is preferable that the virtual temporary denture (m60) is set based on the planning image (m1). Here, it is desirable to understand that the virtual temporary denture (m60) is design information of the temporary denture (60). The virtual temporary denture (m60) includes a virtual temporary gum portion (m62) and a virtual temporary tooth portion (m61). Here, the height and row of teeth of the virtual temporary tooth unit (m61) can be set in consideration of the vertical dimension and the chewing relationship with the opposing arch. In addition, the virtual temporary gum part (m62) is connected to surround the root side of the virtual temporary tooth part (m61), and the inner contour of the virtual temporary gum part (m62) contains three-dimensional surface information (m2) of the target arch. ,m3) can be set correspondingly.

At this time, it is preferable that the virtual insertion groove (m63) is set at a position corresponding to the installation information (m8). Here, it is preferable to understand that the virtual insertion groove m63 is design information of the temporary insertion groove formed in the temporary denture. The virtual insertion groove m63 is preferably set as a groove with a first volume exceeding the maximum cross-sectional area and protrusion height of the protective cap, which will be described later.

Here, it is more preferable that the first volume is set to include a preset position error interval (5) centered on the placement information (m8). The position error interval (5) is preferably understood as an error value that can occur between the placement information (m8) and the actual placement position (6) of the fixture (8). Therefore, the first volume can be set by including the maximum cross-sectional area and protrusion height of the protect cap and the position error interval 5 as a radius value and a height value.

Figure 4 is an exemplary diagram showing the inner surface of a temporary denture in the method of manufacturing a digital overdenture according to an embodiment of the present invention, and Figure 5 is a correction diagram of a temporary denture in the method of manufacturing a digital overdenture according to an embodiment of the present invention. This is an example diagram showing the process.

2 to 4, the virtual temporary denture (m60) is transmitted to the manufacturing device 203, and the temporary insertion groove (63) corresponding to the virtual insertion groove (m63) is formed. ) is manufactured. At this time, the temporary denture 60 includes a temporary gum portion 62 and a temporary tooth portion 61, and the temporary gum portion 62 and the temporary teeth portion 61 are three-dimensionally printed and then painted. It is preferable that it is manufactured through a process.

Meanwhile, the fixture is installed in the target arch in response to the placement information (m8). At this time, it is preferable that a surgical guide be provided to guide the exact installation position of the fixture. Here, the surgical guide is preferably designed based on the planning image (m1) and manufactured through the manufacturing device 203. The surgical guide has a guide hole formed at a position corresponding to the placement information (m8). Therefore, as a tool such as a drill is supported on the inner peripheral surface of the guide hole, the fixture can be installed in an accurate position.

Referring to Figures 4 and 5, it is preferable that the attachment 20 is fastened to the upper side of the fixture 8. In addition, it is preferable that the protection cap 30 is coupled to the top of the attachment 20 so as to shield the catching protrusion 24 formed on the top of the attachment 20.

In addition, it is preferable that relining resin (s1) is applied to the inner surface of the temporary denture (60). Here, the relining resin (s1) is preferably made of a material that has a cushioning feeling after curing and is not excessively deformed by pressure. For example, the relining resin (s1) may be made of silicone material. Then, the temporary denture 60 coated with the relining resin s1 is installed in the target arch. At this time, the relining resin (s1) applied to the inner surface of the temporary denture 60 and the target arch are arranged to face each other.

Here, when the upper and lower jaws occlude, the relining resin s1 is filled and pressed into the gap between the temporary insertion groove 63 and the protect cap 30 through occlusal pressure. That is, the space between the protective cap 30 and the temporary insertion groove 63 formed with a volume larger than the volume of the protective cap 30 may be filled with the relining resin s1. In addition, the relining resin s1 may be filled and pressed into the gap occurring between the inner surface of the temporary denture 60 and the outer surface of the target arch 2. Accordingly, a groove corresponding to the outer shape of the protect cap 30 may be formed in the relining resin s1 in a negative shape through the occlusal pressure.

It is preferable that the temporary insertion groove 63 is formed into a correction groove 163 through this process. The correction groove 163 may be formed by considering the actual installation position 6 of the fixture 8 installed in the target arch and the coupling position of the attachment 20. Therefore, through the correction process of the temporary denture 60, even the slightest surgical error between the actual placement position 6 of the fixture 8 and the placement information m8 established in the tooth restoration planning stage can be compensated. In addition, since accurate design information of the digital overdenture 300 is obtained based on the correction groove 163 formed through the correction process of the temporary denture 60, tooth restoration precision can be significantly improved.

Meanwhile, the protection cap 30 is provided to shield the undercut structure formed by the step groove 24a of the attachment 20. In addition, the protective cap 30 can function to set the regeneration range of the gums instead of a typical healing abutment. In detail, in order to install the fixture 8 into the alveolar bone 1, the gum, which is a soft tissue covering the alveolar bone 1, is first incised and removed. At this time, the gums can be removed as if cut out using a drill tool for gum removal, and through this, a circular incision hole (3) can be formed in the gums. Here, the removal range of the gum, that is, the inner diameter of the incision hole 3, may correspond to a cross-sectional area exceeding the outer diameter of the housing cap 10. Accordingly, the incision area of the gum can be minimized and interference with surrounding tissues during the installation process of the fixture 8 can be minimized.

Here, the protection cap 30 is preferably provided to have a continuous cross-sectional area in the longitudinal direction. Therefore, in the process of correcting the temporary denture 60, a groove corresponding to the outer shape of the protective cap 30 can be accurately formed in the relining resin s1 in a negative shape. In addition, when correcting the temporary denture 60, it is possible to fundamentally prevent the relining resin (s1) from flowing into the undercut structure. Therefore, it is possible to solve the problem that traction force due to resin flowing into the undercut structure is applied to the attachment 20 and the fixture 8 when the temporary denture 60 is separated from the target arch. Through this, the fixture 8 can be fixed to the initial position and direction in which it is installed in the alveolar bone 1. In addition, the safety of the procedure can be significantly improved by preventing damage from occurring as traction is applied to the alveolar bone (1).

Moreover, since the undercut structure of the attachment 20 is shielded through the protective cap 30, the attachment 20 can be immediately fixed to the fixture 8 after the fixture 8 is installed in the target arch. You can. That is, when a patient visits a dentist to install the fixture 8, fixation of the attachment 20 and manufacturing/correction of the temporary denture 60 can be substantially performed. Therefore, the inconvenience of first fastening the healing abutment, allowing a healing period, and then replacing the attachment 20 again can be eliminated. In this way, the present invention can simplify the patient's visit and surgical process for tooth restoration, and the parts required for tooth restoration can be reduced, thereby significantly improving economic efficiency.

Figure 6 is an exemplary diagram showing an attachment device applied to the manufacturing method of a digital overdenture according to an embodiment of the present invention, and Figure 7 is an exemplary diagram of a protect cap according to an embodiment of the present invention viewed from the top.

Referring to Figures 6 and 7, the attachment device 50 preferably includes the attachment 20, the housing cap 10, and the protection cap 30.

The attachment 20 preferably includes a coupling portion 23 and a fixing portion 21. The coupling portion 23 is a portion coupled to the fixture to support the digital overdenture. Additionally, the fixing part 21 is integrally provided on the upper side of the coupling part 23 and is provided to protrude inside the cut hole. At this time, the locking protrusion 24 protrudes along the upper outer periphery of the fixing part 21, and the step groove 24a formed on the lower side of the locking protrusion 24 and the locking protrusion 24 have an undercut structure. It can be formed in steps. In addition, it is preferable that a screw groove 25 is formed in the fixing part 21.

The housing cap 10 is attached and fixed to a buried groove formed on the inner surface of the digital overdenture using a curable resin. In addition, it is preferable that a restraining protrusion 11 protruding in a radial inward direction is formed on the lower edge of the inner peripheral surface of the housing cap 10 so that the locking protrusion 24 is caught. At this time, a method of fixing the housing cap 10 to the digital overdenture will be described later.

The protection cap 30 is selectively coupled to the upper end of the attachment 20 so that the step groove 24a is shielded when the temporary insertion groove formed in the temporary denture is corrected with the correction groove. At this time, it is preferable to understand that the protective cap 30 is not permanently coupled to the attachment 20 but is separated/removed after being coupled when necessary.

In detail, the inner circumferential diameter of the protect cap 30 corresponds to the outer diameter of the locking protrusion 24, and the outer circumferential diameter is preferably formed at a preset radius value that sets the regeneration range of the gums. Furthermore, the protection cap 30 is preferably formed with a radius corresponding to the outer diameter of the housing cap 10. That is, the outer diameters of the protection cap 30 and the housing cap 10 are formed to substantially correspond to each other. Through this, the position information of the housing cap 10 can be accurately and precisely obtained from the image obtained by scanning the corrected temporary denture 60.

In addition, the side portion 32 of the protection cap 30 is preferably formed to extend beyond the lower edge of the locking protrusion 24 to a length that contacts the margin portion 22 formed on the attachment 20.

The protective cap 30 is preferably provided with a screw protrusion 35 formed with a threaded part 35a that is screwed into the screw groove 25. That is, the protect cap 30 can be firmly fixed by a simple method of screwing the screw protrusion 35 into the screw groove 25 formed in the attachment 20. In addition, after the use of the protection cap 30 is completed, the protection cap 30 can be easily separated by rotating, so convenience of use can be significantly improved.

At this time, the protective cap 30 may be separately provided with a cap portion 31 including the side portion 32 and an upper surface portion 33 covering the upper side of the side portion 32 and the screw protrusion portion 35. . That is, in a state in which the cap portion 31 is coupled to cover the upper side of the attachment 20, the threaded portion 35a is inserted through the through hole 34 formed in the upper surface portion 33 and is inserted into the screw groove. It can be screwed into (25). At this time, the edge of the through hole 34 may be countersinked or counterbored, and the pressing portion 36 formed at the top of the screw protrusion 35 may press and secure the edge of the through hole 34. there is.

Additionally, the cap portion 31 of the protect cap 30 may be manufactured from a synthetic resin material. In addition, it is preferable that at least one scan alignment surface portion 32c is formed on the outer peripheral surface of the protect cap 30, preferably on the outer peripheral surface of the cap portion 31. That is, the protective cap 30 shields the undercut structure of the attachment 20, forms the correction groove 163 in the temporary denture 60, not only sets the regeneration range of the gums, but also acts as a scan body. Performs multiple functions. Through this, the inconvenience of replacing and combining multiple parts to perform each of the above-mentioned functions is eliminated, thereby further improving the convenience and speed of the procedure.

Meanwhile, referring to 5, the attachment 20 is fixed to the fixture 8, and the protection cap 30 is coupled to the upper end of the attachment 20. Accordingly, the protection cap 30 protrudes inside the cut hole 3. In addition, three-dimensional surface information of the target arch where the protection cap 30 protrudes can be obtained through the imaging device. Subsequently, the correction process of the above-described temporary denture 60 can be performed.

Figures 8a and 8b are illustrations showing modifications of the protect cap applied to the manufacturing method of the digital overdenture according to an embodiment of the present invention. In this modified example, the basic configuration except for the side portion is the same as the above-described embodiment, so detailed description of the same configuration will be omitted.

Referring to FIG. 8A, the protection cap 30A may be formed in a cylindrical shape with the upper and lower portions of the side portion 32a penetrating. This protection cap (30A) may be formed in a cylindrical shape with a length exceeding the fixing portion (21). The protection cap 30A may be temporarily fixed to the attachment 20 using a temporary adhesive. Here, it is preferable to understand that the temporary adhesive is an adhesive that has an adhesive strength sufficient to secure the protect cap 30 to the attachment 20 with respect to the adhesive strength of the relining resin.

Alternatively, referring to FIG. 8B, the protection cap 30B may be provided with the side portion 32b shielded through the upper surface portion 22b. Accordingly, it is possible to prevent the relining resin (s1) from penetrating into the screw groove (25) formed in the attachment (20).

Figure 9 is an exemplary diagram showing the creation process of a virtual overdenture base in the manufacturing method of a digital overdenture according to an embodiment of the present invention.

Referring to FIG. 9, it is preferable that a corrected scanning image (m162) of the temporary denture is acquired through the imaging device. Here, the correction scanning image (m162) is obtained by scanning the entire inner and outer surface of the temporary denture, and it is preferable to understand that the remaining portion except the image of the inner surface of the temporary gum portion including the correction groove is erased. . It is preferable to understand that the erasure means that part of the image is deleted or rendered invisible.

And, it is preferable that the correction scanning image (m162) is loaded into the planning unit. At this time, it is preferable that the correction groove image (m163) corresponding to the correction groove is displayed concavely in the correction scanning image (m162).

Meanwhile, it is preferable that the virtual overdenture base (m301) is created based on the correction scanning image (m162). Here, it is desirable to understand that the virtual overdenture base (m301) is design information for the actual overdenture base. The overdenture base includes an artificial gum portion and an artificial tooth portion, which will be described later.

In addition, it is preferable that a virtual buried portion exceeding the volume of the housing cap is set in the virtual overdenture base (m301). Here, it is preferable to understand that the virtual embedment part is design information of the embedment part actually formed in the overdenture base.

In detail, it is preferable that the virtual gum part (m303), which is three-dimensional external shape information of the artificial gum part, is virtually arranged above the three-dimensional external shape information of the target arch displayed in the correction scanning image (m162) or the planning image.

In addition, it is preferable that the virtual tooth part (m302), which is the three-dimensional external shape information of the artificial tooth part, is virtually aligned at the top of the virtual gum part (m303). At this time, the inner contour of the virtual gum portion (m303) may be set to correspond to the three-dimensional surface information (m2) or the correction scanning image (m162) of the target arch. In addition, the virtual tooth portion (m302) may have its dentition and chewing surface shape set based on the three-dimensional surface information (m3) of the opposing arch. Moreover, the basic image data of the virtual tooth portion (m302) and the virtual gum portion (m303) are substantially the same data as the virtual temporary tooth portion (m61 in FIG. 3) and the virtual temporary gum portion (m62 in FIG. 3). It is desirable to understand that it is.

Here, it is preferable that a virtual buried groove is set on the lower side of the virtual tooth portion (m302). The position of the virtual buried groove may be virtually aligned based on the correction groove image (m163). In addition, it is preferable that the virtual vent hole (m306) communicating with the virtual buried groove is spaced apart from the root side of the virtual tooth portion (m302) and communicated at an angle toward the rear.

In detail, the virtual gum portion may be set in consideration of the volume of the attachment device 50, that is, the protection cap 30, protruding to the outside of the target arch.

The virtual gum portion (m303) is set, and the root side of the virtual tooth portion (m302) is virtually overlapped along the top of the virtual gum portion (m303). At this time, a virtual assembly groove (m303a) corresponding to the overlapping area of the virtual tooth portion (m302) and the virtual gum portion (m303) may be set on the upper side of the virtual gum portion (m303). Also, the virtual vent hole (m306) can be set to be virtually spaced apart from the virtual assembly groove (m303a). Accordingly, a vent hole, which will be described later, and an assembly groove, which will be described later, can be distinguished.

At this time, the virtual burial part is preferably set through the following series of processes.

First, it is preferable that the virtual housing cap (m10) corresponding to the three-dimensional external shape information of the housing cap is selected and extracted from the digital library and loaded into the planning unit. In addition, it is preferable that the virtual housing cap (m10) is virtually overlapped with the corrected home image (m163) based on preset matching information. Here, the matching information includes a diameter or cross-sectional area calculated from the correction groove image (m163), a center line corresponding to the diameter, and specific position information calculated from the shape of the scan alignment surface displayed on the correction groove image (m163). can be set.

Subsequently, it is preferable that the correction home image (m163) is replaced with the virtual housing cap (m10). Here, it is desirable to understand that swap means replacing or exchanging one image with another image processing or an image transformed according to image processing. That is, the correction home image (m163) can be replaced with the virtual housing cap (m10).

In addition, the virtual buried portion, particularly the virtual buried groove, may be set to be expanded from the outer surface contour of the virtual housing cap m10 to include the clearance gap. That is, the virtual buried groove is set based on the outer contour of the virtual housing cap (m10). Additionally, the virtual vent hole (m306) may be set to be inclined so as to communicate with the virtual buried groove and be spaced apart from the virtual assembly groove (m303a).

Moreover, the virtual burial unit may further include the following series of processes.

A virtual protection cap corresponding to the 3D external shape information of the protection cap may be selected and extracted from the digital library and loaded into the planning unit. Additionally, the virtual protection cap may be virtually superimposed on the corrected home image (m163) based on preset matching information.

At this time, the correction groove 163 is formed in a negative shape corresponding to the outer shape of the protect cap 30 in the relining resin (s1). That is, a common portion may be included in the three-dimensional inner contour of the correction home image (m163) and the three-dimensional outer contour of the virtual protect cap. And, the common part can be set as the matching information. At this time, based on the matching information, the virtual protection cap virtually overlaps with the correction home image (m163), and the correction home image (m163) can be replaced with the virtual protection cap.

At this time, the virtual housing cap (m10) may be selected and extracted from the digital library and loaded into the planning unit. Here, the virtual housing cap (m10) may include the attachment and linkage information. In detail, the linkage information may be set as three-dimensional external shape information about the blocking protrusion and the restraining protrusion formed to be mutually engaged with the housing cap and the attachment.

In addition, the virtual housing cap (m10) virtually overlaps with the virtual protection cap, and the virtual protection cap can be replaced with the virtual housing cap (m10). In detail, selection information on the standard, diameter, height, and mutually matching attachments corresponding to the virtual housing cap (m10) are stored in the digital library along with the external shape information of the virtual housing cap (m10). In addition, selection information on the standard, diameter, height, and mutually matching virtual housing cap (m10) corresponding to the virtual protection cap are stored in the digital library along with the external shape information of the virtual protection cap. Therefore, the virtual housing cap (m10) and the virtual protection cap that match each other can be easily extracted from the digital library.

Moreover, the virtual housing cap (m10) and the virtual protection cap can be set and stored in the digital library. Therefore, when one virtual image is selected, other virtual images associated with it can be extracted as a set. At this time, a plurality of other virtual images are linked to one virtual image and set, and the optimal virtual image required for actual tooth restoration can be accurately extracted from the plurality of different virtual images based on the selection information.

And, based on the selection information, the virtual housing cap (m10) can be virtually aligned at the correct position. Through this series of processes, the virtual embedment part can be set to a more accurate and precise position in response to the correction groove image (m163).

Meanwhile, the virtual overdenture base can be set by further including the following series of processes.

In detail, a first alignment scanning image of the target arch with the protective cap protruding and a second alignment scanning image of the temporary denture with the correction groove formed therein may be respectively acquired through the imaging device. At this time, it is preferable to understand that the second alignment scanning image is substantially the correction scanning image (m162). And, the obtained first alignment scanning image and the second alignment scanning image may be loaded into the planning unit.

Here, the first alignment scanning image may include 3D surface information of the target dental arch and 3D surface information of the protect cap displayed protruding outside the 3D surface information of the target dental arch. And, the second alignment scanning image may include the correction home image (m163).

At this time, the first alignment scanning image and the second alignment scanning image may be virtually overlapped based on image areas that match each other. For example, the first alignment scanning image and the second alignment scanning image may virtually overlap each other based on the 3D surface information of the protect cap and the correction groove image (m163) included in each.

Here, the inner contour of the digital overdenture can be more accurately set based on the three-dimensional surface information of the target arch included in the first alignment scanning image. And, the position of the virtual buried groove can be accurately set based on the correction groove image (m163) included in the second alignment scanning image. Through this, precision between the digital overdenture and the target arch can be significantly improved.

Moreover, since the scan alignment surface portion is formed on the outer surface of the protect cap, the scan alignment surface portion can be displayed as an image at the same position of the first alignment scanning image and the second alignment scanning image. Accordingly, the first alignment scanning image and the second alignment scanning image can be virtually overlapped with the scan alignment surface portion image included in each image as a comparison area, and the degree of registration between each alignment scanning image can be further improved.

In addition, it is preferable that the virtual overdenture base (m301) created through the planning unit is loaded into the manufacturing device to manufacture the actual overdenture base.

Figures 10a and 10b are exemplary views showing the manufacturing process of the final digital overdenture in the manufacturing method of the digital overdenture according to an embodiment of the present invention.

Referring to FIGS. 10A and 10B, the digital overdenture can be finally manufactured through a process that will be described later.

In detail, the overdenture base 301 preferably includes an artificial tooth portion 302 and an artificial gum portion 303. The artificial tooth portion 302 is preferably understood as a portion provided to replace a missing tooth in the target arch 2. In addition, the artificial gum portion 303 is installed to surround the target dental arch 2, and the artificial tooth portion 302 is preferably understood as a portion disposed in response to a preset dental arch.

At this time, it is preferable that an embedding part 304 corresponding to the virtual embedding part is formed in the artificial gum part 303. In detail, the buried portion 304 preferably includes a buried groove 305 recessed to correspond to the virtual buried groove and a vent hole 306 formed through the virtual vent hole to correspond to the virtual vent hole.

The artificial tooth portion 302 and the artificial gum portion 303 may be separately formed of different materials, taking color, strength, etc. into consideration. For example, the artificial gum portion 303 may be made of an acrylic oligomer resin, and the artificial tooth portion 302 may be made of zirconium or the like. Then, the overdenture base 301 can be manufactured as the lower end of the artificial tooth portion 302 is inserted and fixed into the assembly groove 303a formed at the upper end of the artificial gum portion 303. Here, it is preferable to understand that the assembly groove 303a is formed in the artificial gum portion 303 based on the virtual assembly groove.

In detail, the protection cap 30 is separated from the attachment 20. Also, it is preferable that the buried groove 305 is filled with curable resin (r1) and the housing cap 10 is inserted into the buried groove 305. Here, a protective cover 9 may be covered on the outer surface of the target arch 2 to prevent the curable resin r1 from directly sticking to the gums. This protective cover 9 may be made of a thin rubber film, and a hole may be formed through it to expose the upper end of the attachment 20.

At this time, the buried groove 305 includes a preset clearance, and is preferably recessed to exceed the volume of the housing cap 10. Accordingly, a space filled with the curable resin (r1) for firmly attaching the housing cap 10 to the buried groove 305 can be secured through the clearance.

Also, the position of the overdenture base 301 within the embedding groove 305 can be corrected so that the overdenture base 301 is engaged between the upper and lower jaw so that the housing cap 10 is matched and coupled to the attachment 20. That is, during the final manufacturing process of the digital overdenture 300, even the slightest error between the attachment 20 and the housing cap 10 is compensated for, so that precision can be significantly improved when installed in the oral cavity.

At this time, the buried portion 304 preferably includes the vent hole 306 communicating with one side of the buried groove 305. The vent hole 306 extends obliquely to one side of the artificial gum portion 303 corresponding to the tongue, and may be in communication with the buried groove 305. Therefore, when the overdenture base 301 is engaged between the upper and lower jaw, the curable resin (r1) can be moved through the vent hole 306 through the occlusal pressure.

That is, excess resin (r2) excluding the curable resin (r1) substantially filled and pressurized into the gap between the buried groove 305 and the housing cap 10 may be introduced into the vent hole 306. In this way, the vent hole 306 fills the gap between the buried groove 305 and the housing cap 10 and functions as a passage through which the remaining excess resin (r2) is moved and discharged to the outside. Accordingly, it is possible to prevent the excess resin r2 from being excessively pushed out toward the opening of the buried groove 305. Accordingly, it is possible to prevent excessive adhesion of the excess resin r2 to the opening side of the housing cap 10, which is the portion where the attachment 20 is inserted. Through this, it is possible to prevent a problem in which the inner circumference of the housing cap 10 is narrowed due to the excess resin r2 and the coupling precision between the attachment 20 and the housing cap 10 is reduced.

At this time, the excess resin (r2) is moved to the end side of the vent hole 306 through the occlusal pressure, and the inside of the vent hole 306 may be filled with the excess resin (r2). Therefore, there is no need for a separate process to bury the vent hole 306 after fixing the housing cap 10 to the buried groove 305. Through this, the manufacturing convenience of the digital overdenture 300 can be significantly improved.

In addition, since the vent hole 306 and the assembly groove 303a are in communication, the problem of the curable resin r1 flowing into the assembly groove 303a can be fundamentally solved. In addition, the problem of having to form a hole in the artificial tooth portion 302 in order to form the vent hole 306 in the vertical direction can be fundamentally solved.

Through this, the hassle of accurately aligning the holes formed in the artificial gum portion 303 and the artificial tooth portion 302 or filling the holes formed in the artificial tooth portion 302 can be eliminated. In addition, since the problem of durability deterioration due to the formation of holes in the artificial tooth portion 302 is prevented, the artificial tooth portion 302 can stably support the masticatory pressure. Moreover, since the vent hole 306 is opened on the lingual side of the artificial gum portion 303, the vent hole 306 is not exposed to the outer surface of the digital overdenture 300, and aesthetics can be significantly improved.

Moreover, as the vent hole 306 is opened to the rear of the artificial gum portion 303, the problem of the vent hole 306 being exposed to the outside can be substantially eliminated. Therefore, even if the amount of excess resin (r2) is greater than the volume of the vent hole 306 and the excess resin (r2) is pushed out of the vent hole 306, it can be removed and finished. In addition, since no traces of finishing the vent hole 306 are substantially revealed, aesthetics are improved and the patient's satisfaction with use can be significantly improved.

When the excess resin (r2) discharged to the outside of the vent hole (306) is removed and the curable resin (r1) is cured, the housing cap (10) is attached and fixed to the embedded portion (304) and the digital over The denture 300 can be finally manufactured.

Meanwhile, terms such as “include,” “comprise,” “equip,” or “have,” as used above, mean that the corresponding component may be present, unless specifically stated to the contrary. Rather than excluding a component, it should be interpreted as allowing additional inclusion of other components. All terms, including technical or scientific terms, unless otherwise defined, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Commonly used terms, such as terms defined in a dictionary, should be interpreted as consistent with the contextual meaning of the related technology, and should not be interpreted in an idealized or overly formal sense unless explicitly defined in the present invention.

As explained above, the present invention is not limited to the above-described embodiments, and modifications and implementations can be made by those skilled in the art without departing from the scope of the claims of the present invention. And such modifications fall within the scope of the present invention.

m1: Planning image m10: Virtual housing cap
m60: Virtual temporary denture m162: Correction scanning image
8: Fixture 10: Housing cap
20: Attachment 24: Stumbling protrusion
30: Protect cap 300: Digital overdenture
305: Buried groove 306: Vent hole

Claims (10)

A method of manufacturing a digital overdenture in which a housing cap is fixed on the inner side so that it can be attached and detachably installed in the oral cavity through an attachment that is fixed to the target arch and has a locking protrusion protruding in the radial outer direction of the upper outer circumference and is formed to be stepped from the lower side, comprising:
A first step in which a virtual temporary denture with a virtual insertion groove is set at a position corresponding to the placement information set in the planning image in which the image information for the oral cavity is virtually integrated through a planning unit;
A second step in which the virtual temporary denture is transmitted to a manufacturing device to manufacture a temporary denture having a temporary insertion groove corresponding to the virtual insertion groove;
A third step in which the attachment is fastened to the upper side of the fixture installed in the target arch according to the installation information, and a protection cap is coupled to the top of the attachment to shield the blocking protrusion;
A virtual embedding part exceeding the volume of the housing cap is set based on a correction scanning image obtained through an imaging device and loaded into the planning unit for the temporary denture in which the temporary insertion groove is corrected with a correction groove corresponding to the protection cap. A fourth step in which a virtual overdenture base is created, and the virtual overdenture base is transmitted to the manufacturing device to manufacture an overdenture base including an artificial tooth portion and an artificial gum portion on which an embedded portion corresponding to the virtual embedded portion is formed; and
A method of manufacturing a digital overdenture including a fifth step in which the housing cap is attached and fixed to one side of the embedded part to finally manufacture the digital overdenture. According to claim 1,
The fifth step is,
Filling the buried portion, which is recessed with a preset clearance to exceed the volume of the housing cap, with curable resin and inserting the housing cap;
Correcting the position of the overdenture base within the embedding portion so that the overdenture base is pressed between the upper and lower jaw through occlusal pressure so that the housing cap is matched and coupled to the attachment;
A method of manufacturing a digital overdenture, comprising the step of moving and filling the curable resin from the embedding portion through a vent hole formed in oblique communication with one side of the artificial gum portion corresponding to the lingual side of the artificial tooth portion. According to claim 2,
The fourth step is,
Virtually aligning a virtual tooth part, which is three-dimensional external shape information of the artificial tooth part, on the top of a virtual gum part, which is three-dimensional external shape information of the artificial gum part, and forming the virtual embedding part on a lower side of the virtual tooth part;
A method of manufacturing a digital overdenture comprising the step of setting a virtual vent hole in communication with the virtual embedment portion to be spaced apart from the root side of the virtual tooth portion and inclined toward the rear. According to claim 1,
In the third step, the protective cap is
The inner circumferential diameter corresponds to the outer circumference of the locking protrusion, and the outer circumferential diameter is formed at a preset radius value that sets the regeneration range of the gums,
A method of manufacturing a digital overdenture, characterized in that the side portion extends beyond the lower edge of the locking protrusion to a length that contacts the margin portion formed on the attachment. According to claim 4,
In the fourth step, the virtual embedding unit
selecting and extracting a virtual housing cap corresponding to the three-dimensional external shape information of the housing cap from a digital library and loading it into the planning unit;
Virtually overlapping the virtual housing cap on the correction home image concavely displayed in the correction scanning image based on preset matching information;
A digital over, characterized in that the correction home image is swapped with the virtual housing cap, and is extended from the outer contour of the virtual housing cap to include a preset clearance to exceed the volume of the housing cap. Denture manufacturing method. According to claim 4,
In the fourth step, the virtual embedding unit
A virtual protection cap corresponding to the three-dimensional appearance information of the protection cap is selected and extracted from the digital library and loaded into the planning unit;
Virtually overlapping the virtual protection cap on the correction groove based on preset matching information;
A digital over, characterized in that the virtual housing cap including the attachment and linkage information is extracted from the digital library and loaded into the planning unit, and the virtual housing cap is set including the step of virtual overlap and replacement swap with the virtual protection cap. Denture manufacturing method. According to claim 4,
In the third step, the outer diameter of the protective cap is formed to a radius value corresponding to the outer diameter of the housing cap. According to claim 4,
In the third step, a screw groove is formed in the upper central part of the attachment,
A method of manufacturing a digital overdenture, characterized in that the protective cap is provided with a screw protrusion that is screwed into the screw groove. According to claim 4,
The fourth step is,
A first alignment scanning image of the target arch with the protective cap protruding and a second alignment scanning image of the temporary denture with the correction groove formed thereon are acquired through the imaging device and loaded into the planning unit;
Virtually overlapping the first alignment scanning image and the second alignment scanning image based on a cap image matching each other and a correction home image displayed on the correction scanning image;
The virtual embedding part is set based on the correction groove image, and the inner contour of the virtual gum part, which is the 3D external shape information of the artificial gum part, is set based on the 3D surface information of the target arch included in the first alignment scanning image. A method of manufacturing a digital overdenture comprising the step of: According to claim 1,
In the second step, the virtual insertion groove is formed as a groove of a first volume exceeding the maximum cross-sectional area and protrusion height of the protective cap to include a preset position error interval centered on the installation information,
In the third step, the correction groove is
Applying relining resin to the inner surface of the temporary denture and placing it on the target arch;
Digital over, characterized in that the position error interval is corrected by filling and pressing the relining resin into the gap between the temporary insertion groove and the protective cap through occlusal pressure so that the position error interval corresponds to the actual installation position of the fixture. Denture manufacturing method.

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