Partial denture production method, program, and partial denture

Abstract

To provide partial dentures and the like with higher strength than conventional ones, even in minute parts such as springs.SOLUTION: Provided is a partial denture production method for producing a partial denture 1 including a denture base 5 serving as a base for supporting an artificial tooth 3 and a clasp to be fastened to a tooth in an oral cavity, the method including a cutting step of cutting out the denture base and the clasp integrally from a metal material or a PEEK material. According to the present invention, it is possible to provide a partial denture or the like that is less likely to be broken even in a fine portion such as a spring portion due to bruxism or clenching and has higher strength than conventional partial dentures.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a partial denture production method, a program, and a partial denture, and in particular to a partial denture production method for producing a partial denture that has a base that serves as a foundation for supporting artificial teeth and fasteners that fasten to the teeth in the oral cavity. [Background technology]

[0002] Figure 8 illustrates a conventional partial denture 21, showing a state in which a plurality of partial dentures 21 are fitted, as viewed from (a) the front, (b) the left side, and (c) the palate. In general, a partial denture 21 comprises artificial teeth 23 that are placed in the areas where natural teeth are missing, base portions 25 that support the artificial teeth 23, and spring portions 27 fixed to the base portions 25. Such a partial denture 21 is fitted by hooking the spring portions 27 onto remaining teeth 29 that are close to the areas where natural teeth are missing (Patent Document 1).

[0003] As shown in FIG. 8, in a conventional partial denture 21, the artificial teeth 23 and base portion 25 are generally made of resin, and the spring portion 27 is generally made of metal such as cobalt chrome or nickel. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-142504 Summary of the Invention [Problem to be solved by the invention]

[0005] However, conventional partial dentures are known to be easily damaged by teeth grinding and clenching, with soft materials such as resin and thin components such as springs being particularly susceptible to breakage.

[0006] Therefore, an object of the present invention is to provide a partial denture or the like that has higher strength than conventional dentures, even in small parts such as springs. [Means for solving the problem]

[0007] A first aspect of the present invention is a method for producing a partial denture comprising a base portion that serves as a base for supporting artificial teeth and fasteners that fasten to teeth in the oral cavity, the method including a cutting step in which the base portion and the fasteners are cut out as a single unit from a metal material or PEEK material.

[0008] A second aspect of the present invention is the partial denture production method of the first aspect, wherein in the cutting step, the artificial teeth are also cut out as a single unit in addition to the base and the fasteners.

[0009] A third aspect of the present invention is a method for producing a partial denture according to the first or second aspect, wherein the metal material or the PEEK material has at least two surfaces, a first surface and a second surface that is different from the first surface, and in the cutting step, the metal material or the PEEK material is cut from the first surface and the second surface.

[0010] A fourth aspect of the present invention is the method for producing a partial denture according to any one of the first to third aspects, wherein in the cutting step, the denture is cut out from the metal material containing titanium in its composition.

[0011] A fifth aspect of the present invention is the method for producing a partial denture according to the fourth aspect, wherein the metal material is a titanium-nickel alloy.

[0012] A sixth aspect of the present invention is the partial denture production method according to the fourth or fifth aspect, wherein the blade of the cutting machine used in the cutting step is fixed by an electromagnetic lock.

[0013] A seventh aspect of the present invention is a partial denture production method according to any one of the second to sixth aspects, further comprising a data creation step of creating shape data of the partial denture before the cutting step, the data creation step including at least an individual data creation step of separately creating artificial tooth data which is shape data of the artificial tooth or the abutment of the artificial tooth, and base data which is shape data of the base, and a data integration step of integrating the artificial tooth data and the base data to form partial denture data, and in the cutting step, the partial denture is cut out based on the partial denture data.

[0014] An eighth aspect of the present invention is a program for causing a computer to execute the data creation step of the seventh aspect.

[0015] A ninth aspect of the present invention is a partial denture comprising a base portion that serves as a base for supporting artificial teeth and fasteners that are fastened to the teeth in the oral cavity, wherein the base portion and the fasteners are made of the same metal material or PEEK material and are an integral structure with no joints made of other materials between them.

[0016] A tenth aspect of the present invention is the partial denture of the ninth aspect, further comprising the artificial teeth, wherein the artificial teeth and the base portion are of an integral structure with no joint between them and are made of the same metal material or PEEK material.

[0017] An eleventh aspect of the present invention is the partial denture of the tenth aspect, wherein the artificial tooth comprises an abutment made of the metal material or the PEEK material, and an artificial tooth cover made of resin or ceramic that covers the abutment.

[0018] A twelfth aspect of the present invention is the partial denture according to any one of the ninth to eleventh aspects, further comprising a bridge connecting parts of the base parts that contact non-adjacent teeth.

[0019] A thirteenth aspect of the present invention is the partial denture of the twelfth aspect, wherein the bridging portion has flat first and second flat portions, and a bridging connecting portion that connects the first and second flat portions and is thicker than the first and second flat portions.

[0020] A fourteenth aspect of the present invention is the partial denture according to the twelfth or thirteenth aspect, which is used in the upper jaw, and the bridge portion is formed so as to fit along the inside of the palate.

[0021] A fifteenth aspect of the present invention is a partial denture according to the twelfth or thirteenth aspect, which is used in the lower jaw, and the bridge portion is formed so as to fit along the inside of the gums of the lower jaw.

[0022] A sixteenth aspect of the present invention is a partial denture according to any one of the eighth to fifteenth aspects, which is made of the metal material containing titanium in its composition. [Effects of the Invention]

[0023] In conventional dental technology, casting, which is used to process metal, can result in the formation of air bubbles called casting voids, which reduces the strength of the metal. This makes it difficult to process thin fasteners with sufficient strength.

[0024] According to each aspect of the present invention, it is possible to provide a partial denture or the like that is free from the risk of blowholes, has an integrated structure in which the base and spring parts are made of the same metal material or PEEK material, and has no joints between them, making it possible to provide a partial denture or the like that is stronger than conventional ones and is resistant to breakage even in small parts such as the spring parts due to teeth grinding or clenching.

[0025] If a casting method were used to manufacture a partial denture, if the finished product were thick, the mold would also need to be considerably thicker. This would increase costs and make this method impractical. On the other hand, it would be possible to manufacture the base and artificial teeth separately using metal or PEEK materials and then attach them using resin or other materials. However, there is a risk that the adhesive part will come off due to teeth grinding or clenching.

[0026] Therefore, according to the second or ninth aspect of the present invention, the entire partial denture has an integral structure and is made of the same metal material or PEEK material, making it possible to provide a partial denture, etc. with even higher strength.

[0027] Furthermore, conventional artificial dentures were provided in a series of standardized sizes, which did not necessarily fit the user perfectly. As a result, when using artificial dentures, the bite alignment was poor, resulting in reduced bite force and increased wear.

[0028] In contrast, according to the second or ninth aspect of the present invention, it is possible to provide custom-made dentures. This makes it easy to provide artificial dentures with strong occlusal force. Furthermore, improved occlusion makes it possible to reduce wear.

[0029] However, when cutting out the artificial teeth integrally with the base and fasteners, a complicated cutting process is required. Therefore, according to the third aspect of the present invention, it is easy to cut out the partial denture including the artificial teeth integrally using a metal material or PEEK material.

[0030] Titanium has properties suitable for use as a dental material, such as high strength, light weight, biocompatibility, and corrosion resistance.

[0031] However, in the dental laboratory industry, where manual work is the norm, titanium, which is known to be one of the most difficult metals to process, was never considered an option for using it as a material for fasteners.

[0032] Titanium is generally melted using a high-frequency arc and poured into a mold to be processed as a casting. However, in conventional dental technology, the casting process used to process metals results in the formation of air bubbles called casting voids, which reduces the strength of the material. This makes it difficult to use titanium in thin, narrow parts such as springs.

[0033] Therefore, according to the fourth or fifteenth aspect of the present invention, by cutting out a partial denture as a single piece from a material containing titanium in its composition, it is possible to provide a partial denture that is stronger, lighter, and has better biocompatibility and corrosion resistance than conventional partial dentures.

[0034] Furthermore, according to the fifth aspect of the present invention, by using a shape memory alloy, it becomes even easier to provide a partial denture that is lightweight yet has excellent shape-retaining properties.

[0035] In particular, according to the sixth aspect of the present invention, it is possible to produce partial dentures using a digital processing machine even if the material contains a hard metal such as titanium, which is hard and has a large recoil when cut, making it difficult to cut into small pieces by hand.

[0036] In the dental laboratory industry, where analog processing has traditionally been the norm, the creation of shape data for partial dentures using CAD / CAM has not been widely adopted, and there has been a lot of room for innovation in the digital processing of partial dentures. In particular, the creation of data needed to carve out the complex shapes that combine the artificial tooth portion and base portion from metal material has been an unexplored field.

[0037] Therefore, according to the seventh aspect of the present invention, it is possible to use a digital processing machine to manufacture a one-piece partial denture using CAD / CAM.

[0038] Furthermore, according to the eleventh aspect of the present invention, it is possible to provide a false tooth that has the strength of a metal denture and has a natural appearance that is indistinguishable from the user's remaining teeth.

[0039] Furthermore, if the artificial tooth cover is damaged, only the artificial tooth cover needs to be replaced, making it possible to repair and maintain the false tooth portion more easily and quickly than before.

[0040] In addition, conventional partial dentures have resin covering a large area of ​​the inside of the gums to provide a solid base. This causes significant discomfort, as the user's tongue frequently touches the resin. Furthermore, having a large area of ​​the gums covered by resin can also be a cause of taste disorders.

[0041] Therefore, according to the twelfth aspect of the present invention, by connecting distant portions of the base with bridges, it is possible to utilize the elasticity of metal or PEEK material to impart elasticity to the entire partial denture and maintain its strength. This eliminates the need to form a thick base on the inside of the gums, making it possible to expose the gums as much as possible. This makes it less likely that the tongue will come into contact with the partial denture base, reducing discomfort in the user's mouth.

[0042] Furthermore, by reducing the thickness of the floor portion, it is possible to maintain the texture of food and drink, including heat, as much as possible, and reduce taste disorders.

[0043] Furthermore, according to the thirteenth aspect of the present invention, it becomes easy to achieve both elasticity and strength in the crosslinked portion.

[0044] Furthermore, according to the fourteenth or fifteenth aspect of the present invention, it becomes easy to maintain the strength of the partial denture while exposing the mucous membrane in the oral cavity as much as possible. [Brief explanation of the drawings]

[0045] [Figure 1] 1 is a diagram showing an outline of a partial denture according to an embodiment of the present invention. [Figure 2] 1 is a diagram showing an outline of the flow of a partial denture production method according to an embodiment of the present invention. [Figure 3] FIG. 10 is a diagram showing individual data in an embodiment of the present invention. [Figure 4] Titanium disks used to carve partial dentures, (a) front and (b) back views. [Figure 5] FIG. 10 is a diagram showing an outline of a partial denture according to another embodiment of the present invention. [Figure 6] 10A and 10B are diagrams showing an image of how a partial denture according to Example 3 is worn, in which (a) is a diagram showing an image of the upper jaw side, and (b) is a diagram showing an image of the lower jaw side. [Figure 7] 10A and 10B are diagrams illustrating a dental implant according to Example 4, including (a) an image of the metal abutment as seen from inside the oral cavity, (b) an image of the abutment as seen from outside the oral cavity, and (c) an example of an artificial tooth cover. [Figure 8] FIG. 1 is a diagram illustrating a conventional partial denture. [Figure 9] 1A and 1B are diagrams showing an image of how a conventional partial denture is worn, in which (a) is a diagram showing an image of the upper jaw side, and (b) is a diagram showing an image of the lower jaw side. DETAILED DESCRIPTION OF THE INVENTION

[0046] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following examples. [Example]

[0047] Fig. 1 is a diagram showing an outline of a partial denture 1 according to this embodiment (an example of the "partial denture" set forth in the claims of the present application). In Fig. 1, the partial denture 1 is for the upper jaw and is shown attached to a dental cast.

[0048] The partial denture 1 comprises an artificial tooth 3 (an example of an "artificial tooth" as described in the claims of the present application), a base portion 5 (an example of a "base portion" as described in the claims of the present application), and a spring portion 7 (an example of a "fastener" as described in the claims of the present application).

[0049] The base portion 5 is the base portion that supports the artificial teeth. The spring portion 7 extends from the base portion 5 and hooks onto the remaining teeth remaining in the oral cavity to fix the partial denture 1. In Figure 1, a remaining tooth model 9 is shown using a dental cast.

[0050] Conventional partial dentures were weak because the artificial teeth, base, and spring parts were manufactured as separate parts and glued together with resin or other adhesive.

[0051] In the partial denture 1 according to this embodiment, the artificial teeth 3, base portion 5, and spring portion 7 are integrally formed with no joints between them and are made of the same metal material. Materials containing titanium are particularly suitable as metal materials. Titanium-nickel alloys are even more preferable.

[0052] This makes it possible to provide a partial denture that is stronger than ever before, even in small parts such as the spring portion 7. Because the entire partial denture 1 has a one-piece structure and is made from a material that contains titanium, it is possible to provide a partial denture that is stronger and lighter than ever before, and that has excellent biocompatibility and corrosion resistance.

[0053] The partial denture 1 of this embodiment is extremely strong and can withstand teeth grinding and clenching.

[0054] Furthermore, by making the entire partial denture a one-piece structure, it is possible to create a partial denture that is thinner than conventional partial dentures, which have a joint between the base and the artificial teeth. This makes it possible to provide partial dentures suitable for people whose bite gap between the upper and lower jaws is shorter than standard. Conversely, for people whose standard artificial teeth are not tall enough, it is also possible to appropriately increase the bite height (bite up).

[0055] FIG. 2 is a diagram showing an outline of the flow of a partial denture production method according to an embodiment of the present invention (an example of the "partial denture production method" set forth in the claims of the present application).

[0056] First, artificial teeth are virtually placed in the missing parts of the dental mold on CAD, and the occlusion is adjusted to create artificial tooth data (step ST01). Next, the designed base data (an example of "base data" as claimed in the present application) and spring data are combined to create spring-integrated denture base data (step ST02). The artificial tooth data (an example of "artificial tooth data" as claimed in the present application) is placed on the spring-integrated denture base data (step ST03). The entire data is converted into STL data (polygons) + voxel data (data using regular lattice units in three-dimensional space) to complete partial denture data (an example of "partial denture data" as claimed in the present application) (step ST04). Then, based on the partial denture data, a digital processing machine is used to carve the partial denture from a block of titanium alloy (step ST05; an example of a "cutting step" as claimed in the present application).

[0057] Fig. 3 is a diagram showing individual data in an embodiment of the present invention. As shown in Fig. 3, by creating artificial tooth data, base data, and spring data separately and then integrating them later, it is possible to create highly accurate partial denture data.

[0058] Here, steps ST01 to ST04 as a whole are an example of a "data creation step" as set forth in the claims of the present application. Also, step ST01 and a part of step ST02 that creates floor data and spring data are an example of an "individual data creation step" as set forth in the claims of the present application. Furthermore, step ST04 is an example of a "data integration step" as set forth in the claims of the present application.

[0059] If an attempt was made to manufacture a one-piece partial denture like that of the present invention by pouring molten titanium into a mold and letting it harden, the mold would have to be quite thick to withstand the pressure, which was not practical.

[0060] Also, because titanium has a low specific gravity, it flies out when a centrifugal casting machine is used to put it into a mold. Even when an attempt was made to melt it and put it into the mold using an arc process using argon gas, its low specific gravity meant that it could not be inserted into the thin section.

[0061] Furthermore, with the conventional casting manufacturing method, even if titanium was used, air bubbles called casting voids would be trapped, reducing the strength of the product.

[0062] According to the partial denture production method of this embodiment, the entire partial denture has a one-piece structure cut out from a block of titanium alloy material, making it possible to provide a partial denture that is stronger and lighter than conventional partial dentures, and that has excellent biocompatibility and corrosion resistance.

[0063] 4 shows a titanium disk 31 from which a partial denture 37 is machined, as viewed from (a) the front surface 33 and (b) the back surface 35. The titanium disk 31 is made of a titanium-nickel alloy.

[0064] 4, when cutting out the artificial tooth, base portion, and spring portion as a single unit, it is difficult to process from one side. For example, by cutting out from both the front surface 33 and the back surface 35 opposite the front surface 33, it becomes easier to cut out partial denture 37, which has a complex structure where the portion to be cut is hidden when viewed from one side.

[0065] Furthermore, when cutting a partial denture from hard titanium metal material, the blade of a digital processing machine (an example of a "cutting machine" as defined in the claims of this application) is fixed with an electromagnetic lock, which suppresses recoil during cutting and makes it possible to cut out complex shapes such as the partial denture of the present invention with high precision. [Example]

[0066] Next, an embodiment in which the base and fasteners are integrated, but the artificial teeth are not integrated, will be described with reference to Figure 5. Figure 5 is a diagram showing an outline of a partial denture 11 (an example of the "partial denture" set forth in the claims) according to another embodiment of the present invention. In Figure 5, the partial denture 11 is for the upper jaw and is shown attached to a dental cast.

[0067] The partial denture 11 comprises an artificial tooth (an example of an "artificial tooth" as described in the claims of the present application), a base portion 15 (an example of a "base portion" as described in the claims of the present application), and a spring portion 17 (an example of a "fastener" as described in the claims of the present application).

[0068] 5 does not show the artificial teeth, but instead shows the artificial tooth connecting part 14 that connects the artificial teeth to the base part 15. That is, in this embodiment, the artificial teeth are not integrated with the base part 15, but are structured so that the artificial teeth, which are separate bodies, are attached to the artificial tooth connecting part 14.

[0069] By creating separate artificial teeth that can be inserted, it is possible to repair only the artificial teeth, which makes the repair process easier than if the entire partial denture were one piece.

[0070] The partial denture 11 of this embodiment is also stronger than the conventional partial denture 11. Furthermore, since the structure does not use adhesive between the base 15 and the artificial teeth, it is possible to provide a partial denture that is suitable for people whose bite height between the upper and lower jaws is shorter than the standard, just like the partial denture 1 of Example 1. [Example]

[0071] Next, an example of a partial denture having a bridge portion will be described. Figure 6 shows an image of how the partial denture according to this example is worn, showing (a) the maxillary side and (b) the mandibular side. Figure 9 shows an image of how a conventional partial denture is worn, showing (a) the maxillary side and (b) the mandibular side.

[0072] Referring to Figure 9(a), a conventional upper partial denture 151 has a resin 154 that covers a large portion of the inside of the gums to provide a solid base. This causes a significant discomfort, such as the tongue of the user frequently touching the resin 154. Furthermore, having a large portion of the gums covered by the resin 154 is one of the causes of taste disorders.

[0073] Similarly, referring to Figure 9(b), a conventional lower partial denture 161 also has a resin 164 that covers a large portion of the inside of the gums. This causes a significant discomfort, such as the tongue of the user frequently touching the resin 164. Furthermore, having a large portion of the gums covered by the resin 164 is one of the causes of taste disorders.

[0074] In contrast, referring to FIG. 6(a), the upper partial denture 51 according to this embodiment further includes a bridge portion 53. The bridge portion 53 is formed to fit along the inner surface of the palate. The bridge portion 53 connects the distant portions of the base portion (551, 552) by utilizing the elasticity of the metal to impart elasticity to the entire partial denture 51, thereby enabling it to maintain its strength. Furthermore, when the metal is a titanium-nickel alloy, it also has shape-memory properties, making it even easier to maintain its strength. This eliminates the need to form a thick base on the inside of the gums, allowing the mucosa of the gums 54 to be exposed as much as possible. This reduces the likelihood of the tongue coming into contact with the base portion of the partial denture 51, reducing discomfort in the user's mouth.

[0075] Further, the bridging portion 53 has a flat first flat portion 571 and a flat second flat portion 572, and a bridging connection portion 59. The bridging connection portion 59 connects the first flat portion 571 and the second flat portion 572, and has a structure that is thicker than the first flat portion 571 and the second flat portion 572. By configuring the bridging portion 53 in this way, it becomes easy to achieve both elasticity and strength in the bridging portion.

[0076] Similarly, referring to FIG. 6(b), the lower partial denture 61 according to this embodiment further includes a bridge portion 63. The bridge portion 63 is formed to fit along the inside of the lower gums. The bridge portion 63 connects distant portions of the base portion (651, 652), thereby utilizing the elasticity of the metal to impart elasticity to the partial denture 61 as a whole and maintain its strength. This eliminates the need to form a thick base portion on the inside of the gums, making it possible to expose as much of the mucous membrane of the gums as possible. This makes it less likely that the tongue will come into contact with the base portion of the partial denture 61, reducing discomfort in the user's mouth. [Example]

[0077] Furthermore, an embodiment using an artificial tooth cover will be described in this example. Figure 7 is a diagram illustrating a dental implant according to this example, including (a) an image of a metal abutment seen from inside the oral cavity, (b) an image of the abutment seen from outside the oral cavity, and (c) an image of the artificial tooth cover.

[0078] 7(a) and 7(b), an artificial tooth 71 according to this embodiment has an abutment 73 and an artificial tooth cover 77. The abutment 73 is formed integrally with a base 75. Also, referring to FIG. 7(c), the artificial tooth cover 77 is made of resin or ceramic, and has a hole 79 for accommodating the abutment 73.

[0079] The artificial teeth of this embodiment make it possible to provide a false tooth that has the strength of a metal denture and has a natural appearance that is indistinguishable from the user's remaining teeth.

[0080] Furthermore, if the artificial tooth cover 77 is damaged, only the artificial tooth cover 77 needs to be replaced, which makes it possible to repair and maintain the false tooth portion more easily and quickly than before.

[0081] Titanium is particularly advantageous in that it does not affect the sense of taste, has good thermal conductivity, and is very light. However, other materials may be used that are more desirable in terms of strength, plasticity, thermal conductivity, weight, etc. For example, PEEK may be used instead of titanium for users with metal allergies. [Explanation of symbols]

[0082] 1: Partial denture, 3: Artificial teeth, 5: Base part, 7: Spring part, 9: Remaining tooth model, 11: Partial denture, 14: Artificial tooth connection part, 15: Base part, 17: Spring part, 19: Remaining tooth model 21: Conventional partial denture, 23: Artificial teeth, 25: Base part, 27: Spring part, 29: Remaining tooth model 31: Titanium disc, 33: Surface, 35: Back, 37: Partial denture 51: Partial denture, 53: Bridge portion, 54: Gums, 55: Part of base portion, 571: First flat portion, 572: Second flat portion, 59: Bridge connection portion 61: Partial denture, 63: Bridge, 65: Part of base 71: Partial denture, 73: Abutment, 75: Base, 77: Artificial tooth cover, 79: Hole 151: Conventional partial denture, 154: Resin 161: Conventional partial denture, 164: Resin

Claims

1. A partial denture production method for producing a partial denture having a base portion that serves as a base for supporting artificial teeth and a fastener that fastens to teeth in the oral cavity, comprising: A partial denture production method including a cutting step of cutting out the base portion and the fasteners as a single unit from a metal material or a PEEK material.

2. 2. The partial denture production method according to claim 1, wherein in the cutting step, the artificial teeth are also cut out as a single unit in addition to the base and the fasteners.

3. The metal material or the PEEK material is The first page and The second surface is different from the first surface, and the second surface has at least two surfaces.

3. The partial denture production method according to claim 2, wherein in the cutting step, cutting is performed from the first surface and the second surface of the metal material or the PEEK material.

4. 2. The method for producing a partial denture according to claim 1, wherein the cutting step involves cutting out the denture from a metal material containing titanium as a composition.

5. 5. The method for producing a partial denture according to claim 4, wherein said metal material is a titanium-nickel alloy.

6. 5. The method for producing a partial denture according to claim 4, wherein the blade of the cutting machine used in said cutting step is fixed by an electromagnetic lock.

7. The method further includes a data creation step of creating shape data of the partial denture before the cutting step, The data creation step includes: an individual data creating step of separately creating at least artificial tooth data, which is shape data of the artificial tooth or abutment of the artificial tooth, and base data, which is shape data of the base; a data integration step of integrating the artificial tooth data and the base data into partial denture data, 3. The partial denture production method according to claim 2, wherein said cutting step involves cutting out the partial denture based on said partial denture data.

8. A program for causing a computer to execute the data creation step according to claim 7.

9. A partial denture comprising a base portion that serves as a base for supporting artificial teeth and a fastener that fastens to teeth in the oral cavity, A partial denture in which the base and the fasteners are made of the same metal material or PEEK material and are an integrated structure with no joints made of other materials between them.

10. Further comprising the artificial tooth, 10. The partial denture according to claim 9, wherein the artificial teeth and the base portion are of an integral structure with no joint therebetween and are made of the same metal material or PEEK material.

11. The artificial tooth is a support made of the metal material or the PEEK material; 11. The partial denture according to claim 10, further comprising an artificial tooth cover made of resin or ceramic that covers the abutment.

12. 10. The partial denture according to claim 9, further comprising a bridge portion connecting portions of the base portion that contact non-adjacent teeth.

13. The crosslinking portion is a first flat portion and a second flat portion, 13. The partial denture according to claim 12, further comprising a bridge connecting portion that connects the first flat portion and the second flat portion and that is thicker than the first flat portion and the second flat portion.

14. A partial denture for use in the upper jaw, 13. The partial denture of claim 12, wherein the bridge portion is formed to conform to the inside of the palate.

15. A partial denture for use in the lower jaw, 13. The partial denture according to claim 12, wherein the bridge portion is formed so as to follow the inside of the gums of the lower jaw.

16. 10. The partial denture according to claim 9, which is made of said metal material containing titanium in its composition.

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