JP2015006253A - Partial denture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a partial denture in which practical wearing strength can be obtained without impairing esthetics and it is superior in cleaning properties, and food particles are hard to accumulate therein.SOLUTION: A partial denture 100 includes a first denture base 10 detachably worn to an alveolar ridge 122 having a residual tooth 110 and used, and a second denture base 30 separably attracted to the first denture base 10 and used. The position and direction of the first denture base 10 and the second denture base 30 are regulated, by magnetically attracting the first denture base 10 and the second denture base 30 worn to the alveolar ridge 122 with multiple pairs of permanent magnets 24 and keepers 34. Also, an artificial gingival part 40 is locked at an undercut part of the residual tooth 110, and thereby the first denture base 10 and the second denture base 30 are prevented from being separated out of the alveolar ridge 122.

Description

  The present invention relates to a partial denture, that is, a partial denture.

  Dentures are roughly classified into complete dentures (total dentures) and partial dentures (partial dentures). The partial denture includes a denture base (floor portion) used in close contact with the oral mucosa and an artificial tooth integrated with the denture base. In addition, the denture base and the artificial tooth are provided with a hook for hooking the remaining teeth. The buttock is also called a clasp and is generally made by casting a metal material or bending a metal wire. The remaining tooth to which the buttock is attached is called a tooth decay.

  When the front teeth are lost and replaced with artificial teeth of partial dentures, the remaining teeth adjacent to the front teeth, such as canines and other front teeth, become tooth decays. However, since the canine and anterior teeth are easily visible from the outside when the mouth is opened, wearing an annular clasp with these teeth as a toothed hook lacks aesthetics.

  Thus, partial dentures have been proposed that can obtain practical mounting strength without inconvenience in mastication without impairing aesthetics. Patent Document 1 and Patent Document 2 describe a partial denture in which a holding member constituting an artificial gingiva is attached to an artificial tooth so that the hinge can swing, and the holding member is pressed against the remaining tooth to prevent dropping. ing. The swing axis of the hinge in Patent Document 1 is perpendicular to the occlusal surface of the teeth, and a pair of holding members are provided on both front and back sides of the remaining teeth. The swing axis of the hinge in Patent Document 2 is the dentition direction, and the cheek side (outside) artificial gingiva swings. In the partial dentures of Patent Document 1 and Patent Document 2, magnets that are attracted to each other in a state in which the holding member is pressed against the remaining teeth are provided on the holding member and the artificial gingiva, respectively.

  In Patent Document 3 and Patent Document 4, a partial denture in which a basic denture provided with artificial teeth and an auxiliary denture base mounted on the buccal side with respect to the basic tooth base are separable. Is described. Two bottomed concave holes are formed on the surface of the basic tooth base of Patent Document 3, and two protrusions (penetration pin, penetration member) are formed on the inner side surface of the auxiliary denture base. A penetration pin is inserted into one concave hole (guide hole) of the basic tooth base, and a penetration member is inserted into the other concave hole (connection hole). A metal keeper is attached to the tip of the penetrating member, and the keeper is attracted to the magnet provided at the bottom of the connection hole, so that the auxiliary denture base is prevented from being detached from the basic tooth base. .

  In the partial denture of Patent Document 4, the magnetic pole surface of the magnet is exposed on the surface of the basic denture base, and the inner surface of the auxiliary denture base and the surface of the keeper are configured to be flush with each other. It is different from the partial denture. Moreover, the protrusion part which protrudes from the inner surface of an auxiliary denture base consists of several pins, and the concave hole of a fundamental tooth base consists of several pin holes of the same number. The partial dentures of Patent Literature 3 and Patent Literature 4 are fitted with a plurality of protrusions protruding from the auxiliary denture base as positioning pins into a plurality of recessed holes of the basic denture base, whereby the basic denture base and the auxiliary denture base The relative position and orientation are fixed, and the magnet and the keeper are attracted in this state.

No. 7-49934 JP 2004-254911 A JP 2003-126121 A JP 2004-089443 A

  However, the partial dentures of Patent Document 1 and Patent Document 2 are not easy to clean the hinge portion that is the swing shaft of the holding member. When eating candy accumulates at the hinge part, not only bacteria propagate, but also the swinging movement of the hinge is impaired and the holding member does not fully open and close, causing magnet adsorption failure and the partial denture from the alveolar ridge The problem that it becomes easy to drop off arises.

  In the partial dentures of Patent Document 3 and Patent Document 4, the edible cake easily accumulates inside the concave hole of the basic denture base, and the edible cake tends to accumulate at the base of the protruding portion that projects sharply from the auxiliary denture base. There is a problem. In the partial dentures of Patent Document 3 and Patent Document 4, not only germs propagate in the eating bowl, but also the poor adhesion between the magnet and the keeper occurs when the insertion depth of the protrusion is insufficient with respect to the recessed hole. Thus, there is a problem that the auxiliary denture base is easily detached from the basic tooth base.

  The present invention has been made in view of the above-described problems, and provides a partial denture that can obtain a practical mounting strength without impairing aesthetics and that is excellent in cleaning properties and does not easily accumulate candy. It is.

  According to the present invention, a first denture base that is used detachably attached to an alveolar ridge having residual teeth, and a second denture base that is separably adsorbed to the first denture base are provided. A partial denture, wherein the first denture base and the second denture base each have a suction surface provided with a plurality of pairs of magnets or magnetic bodies that are magnetically attracted to each other at corresponding positions spaced apart in the dentition direction. The first denture base or the second denture base includes an artificial tooth and an artificial gingival portion extending outward in the dentition direction from the artificial tooth, and the first denture mounted on the alveolar ridge The position and orientation of the first denture base and the second denture base are regulated by magnetically adsorbing the floor and the second denture base with a plurality of pairs of the magnets or the magnetic body, and the remaining teeth The artificial gingival part is locked to the undercut part of the Partial denture, characterized in that the denture and the second denture is detached from the alveolar ridge is suppressed is provided.

  In the said invention, since the 1st denture base and the 2nd denture base are formed as a separate body which is separably adsorbed, it is excellent in cleaning performance as compared with the inventions of Patent Document 1 and Patent Document 2. Moreover, according to the said invention, since a 1st denture base and a 2nd denture base are magnetically adsorbed in several space apart, it is 1st without using a projection part as a positioning pin like patent document 3 or patent document 4. The relative positions and orientations of the denture base and the second denture base can be matched. Further, when a pulling force is applied to the partial denture of the present invention, the artificial gingiva portion is locked to the undercut portion of the remaining tooth and resists the pulling force. For this reason, the separation of the first denture base and the second denture base can be substantially suppressed only by magnetic force adsorption without fitting the protrusions into the recessed holes as in Patent Document 3 and Patent Document 4, and the partial floor The denture is prevented from leaving the alveolar ridge.

  ADVANTAGE OF THE INVENTION According to this invention, the partial denture which can be hard to visually recognize a buttocks (clasp) from the outside, can obtain practical mounting | wearing intensity | strength, is excellent in cleaning property, and is hard to accumulate | store a bowl is provided.

It is a perspective view which shows the state which mounted | wore the jaw model with the partial denture of 1st embodiment of this invention. It is a disassembled perspective view of the 1st denture base and 2nd denture base of 1st embodiment, and a jaw model. It is a front view of the partial denture of 1st embodiment with which the jaw model was mounted | worn. It is a front view which shows the state which isolate | separated the 2nd denture base from the partial denture of 1st embodiment with which the jaw model was mounted | worn. Fig.5 (a) is the sectional view on the AA line of FIG. FIG. 5B is a cross-sectional view taken along line BB in FIG. It is a perspective view which shows the state which mounted | wore the jaw model with the partial denture of 2nd embodiment. It is a disassembled perspective view of the 1st denture base and 2nd denture base of 2nd embodiment, and a jaw model. It is a front view of the partial denture of 2nd embodiment with which the jaw model was mounted | worn. It is a front view which shows the state in the middle of isolate | separating the 2nd denture base from the partial base denture of 2nd embodiment with which the jaw model was mounted | worn. It is a front view which shows the state which isolate | separated the 2nd denture base from the partial denture of 3rd embodiment with which the jaw model was mounted | worn. It is the XI-XI sectional view taken on the line of FIG. Fig.12 (a) is a perspective view of the partial denture of 4th embodiment with which the jaw model was mounted | worn. FIG.12 (b) is a perspective view which shows the state in the middle of isolate | separating the 2nd denture base from the partial denture of 4th embodiment with which the jaw model was mounted | worn. It is a perspective view which shows the state which isolate | separated the partial denture of 4th embodiment into the 1st denture base and the 2nd denture base. It is a front view of the partial denture of 5th embodiment with which the jaw model was mounted | worn. It is a front view which shows the state which isolate | separated the 2nd denture base from the partial denture of 5th embodiment with which the jaw model was mounted | worn. FIG. 16A is a front view of the first denture base of the fifth embodiment. FIG. 16B is a front view of the second denture base of the fifth embodiment. FIG.16 (c) is the XVI-XVI sectional view taken on the line of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same constituent elements are denoted by the same reference numerals, and redundant description is omitted as appropriate.

<First embodiment>
FIG. 1 is a perspective view showing a state in which the partial denture 100 of the first embodiment is mounted on the jaw model 120. FIG. 2 is an exploded perspective view of the first denture base 10, the second denture base 30, and the jaw model 120 of the present embodiment. FIG. 3 is a front view of the partial denture 100 of this embodiment mounted on the jaw model 120. FIG. 4 is a front view showing a state in which the second denture base 30 is separated from the partial denture 100 of the present embodiment mounted on the jaw model 120.

  First, the outline | summary of the partial denture 100 of this embodiment is demonstrated.

  The partial denture 100 of the present embodiment is used by being detachably attached to the first denture base 10 that is used by being detachably attached to the alveolar ridge 122 having the remaining teeth 110. A second denture base 30. The first denture base 10 and the second denture base 30 have suction surfaces 12 and 32, respectively. A plurality of pairs of magnets or magnetic bodies (permanent magnet 24 and keeper 34) that attract each other by magnetic force are provided at corresponding positions spaced apart in the dentition direction on the attracting surfaces 12 and 32. In addition, one or both of the first denture base 10 and the second denture base 30 includes one or a plurality of artificial teeth 20 and an artificial gingival part 40 extending outward in the dentition direction from the artificial teeth 20. Have. The first denture base 10 and the second denture base 30 mounted on the alveolar ridge 122 are magnetically adsorbed by the plurality of pairs of magnets or magnetic bodies (permanent magnet 24 and keeper 34), and the first denture base 10 and The position and orientation with the second denture base 30 are regulated. And the artificial gingival part 40 is latched by the undercut part 112 (refer Fig.5 (a)) of the residual tooth 110 by making the first denture base 10 and the 2nd denture base 30 adsorb | suck magnetically, and 1st. The denture base 10 and the second denture base 30 are prevented from separating from the alveolar ridge 122.

  Next, the partial denture 100 of this embodiment will be described in detail. The partial denture 100 is a partial denture used by integrating the first denture base 10 and the second denture base 30 to engage the second denture base 30 with the user's remaining teeth 110. The partial denture 100 is used by being mounted in the user's oral cavity. For convenience, in the present embodiment, the partial denture 100 is mounted on the alveolar ridge 122 of the jaw model 120 instead of the user's oral cavity. The present invention will be described with reference to the drawings. The same applies to the second and subsequent embodiments.

  FIG. 1 and the like illustrate the lower jaw model 120, but the partial denture 100 of the present embodiment can be used for both the upper jaw and the lower jaw. An artificial tooth 20 is erected on one or both of the first denture base 10 and the second denture base 30. In order to distinguish between the artificial tooth 20 and the remaining tooth 110, the artificial tooth 20 is partially hatched. The same applies to the second and subsequent embodiments.

  In this embodiment, the artificial tooth 20 is provided in the 1st denture base 10, and the aspect by which the artificial gingiva part 40 is provided in the 2nd denture base 30 is illustrated. The artificial gingival part 40 of the second denture base 30 is configured to move the artificial teeth 20 of the first denture base 10 when the partial denture 100 is used, that is, in a state where the second denture base 30 is magnetically adsorbed to the first denture base 10. It is formed to have a length that reaches both outer sides in the dentition direction with being sandwiched. More specifically, the artificial gingiva part 40 of the second denture base 30 is configured with a length extending on both outer sides in the dentition direction (left-right direction in FIG. 3) with the four artificial teeth 20 interposed therebetween.

  The first denture base 10 includes one or more artificial teeth 20, a denture base 11 that is in close contact with the oral mucosa, and a magnet or magnetic body for magnetically adsorbing to the second denture base 30. By bringing the denture base 11 into close contact with the oral mucosa, the artificial tooth 20 is disposed at the position of the lost tooth in the alveolar ridge. The first denture base 10 of this embodiment includes a permanent magnet 24 as an example of a magnet or a magnetic body. As the permanent magnet 24, a neodymium magnet (NdFeB magnet) can be used. The shape of the magnetic pole surface of the permanent magnet 24 is not particularly limited, but may be a circle having a diameter of 2 mm or more and 3 mm or less. The keeper 34 that attracts the permanent magnet 24 preferably has the same shape and size as the permanent magnet 24. Thereby, when the first denture base 10 and the second denture base 30 are magnetically attracted, the permanent magnet 24 and the keeper 34 are in close contact with each other without being relatively displaced in the in-plane direction of the attracting surfaces 12 and 32. To do.

  The artificial tooth 20 can be made of a hard resin material. The denture base 11 is made of a metal or a resin material. The denture base 11 is provided with clasps 14 at one place or a plurality of places. The clasp 14 may be integrally formed of the same material as the denture base 11, or may be made of a separate member and fixed to the denture base 11. In this embodiment, the aspect in which the denture base 11 and the clasp 14 are integrally formed with a metal material is illustrated. As the clasp 14, in addition to the annular clasp 14a that is worn around the remaining tooth 110, a strip-shaped bar clasp 14b that is used in contact with the inner surface (the lingual surface) of the remaining tooth 110 is provided. The annular clasp 14a is attached to a molar tooth that is difficult to visually recognize from the outside, and the bar clasp 14b is used in contact with the inner surface of an anterior tooth or premolar tooth that is easily visible from the outside. The annular clasp 14a has a stronger holding force than the bar clasp 14b, and contributes by stably fixing the first denture base 10 to the alveolar ridge. In the present embodiment, when the user opens his / her mouth, the clasp 14 is less likely to be visually recognized from the outside, the bar clasp 14b is used for the front teeth and the premolars, and the annular clasp 14a is used only for the molars. doing. And the fall of the fixing force of the 1st denture base 10 by the clasp 14 is assisted by use of the 2nd denture base 30. FIG.

  In the partial denture 100 of the present embodiment, the first denture base 10 is mounted across the alveolar crest 124 of the alveolar ridge 122. The second denture base 30 is attached in close contact with the outer surface of the gingiva, that is, between the gingiva and the cheek. The first denture base 10 is larger than the second denture base 30 and occupies almost the entire volume of the partial denture 100.

  The second denture base 30 includes an artificial gingiva part 40 imitating a human gingiva (gum) and a magnet or a magnetic material. The second denture base 30 is used by being attached to and detached from the first denture base 10. The second denture base 30 may be referred to as a removable denture base. The second denture base 30 of the present embodiment includes a keeper 34 made of a ferromagnetic metal such as soft magnetic stainless steel as a magnetic material. Instead of the metal keeper 34, another permanent magnet that magnetically attracts the permanent magnet 24 of the first denture base 10 may be used.

  Even if the second denture base 30 includes artificial teeth (artificial molars 22 and divided teeth 21b) as in the fourth embodiment (see FIG. 12A) and the fifth embodiment (see FIG. 14). Good.

  The first denture base 10 and the second denture base 30 are in close contact with each other by the suction surfaces 12 and 32. The adsorption surface 12 of the first denture base 10 is provided with the surface (magnetic pole surface) of the permanent magnet 24 exposed so as to be flush (see FIG. 4). On the other hand, the surface of the keeper 34 is exposed on the suction surface 32 of the second denture base 30 (see FIG. 2). The suction surface 12 of the first denture base 10 and the suction surface 32 of the second denture base 30 have smooth curved shapes corresponding to each other. The suction surfaces 12 and 32 are both curved along the dentition of the artificial tooth 20.

  The artificial gingival part 40 extends outside at least one side in the dentition direction from the artificial tooth 20 of the first denture base 10 in a state where the second denture base 30 is magnetically adsorbed to the first denture base 10. Yes. The artificial gingival part 40 of the present embodiment extends on both sides in the dentition direction with a plurality of artificial teeth 20 interposed therebetween. More specifically, as shown in FIG. 3, the first denture base 10 includes artificial teeth 20 corresponding to four front teeth arranged in a row. The remaining teeth 110 adjacent to both sides of these four artificial teeth 20 are toothed teeth, and the bar clasp 14b comes into contact with the inner surface of the toothed teeth (see FIG. 1).

  The suction surface 32 of the second denture base 30 of the present embodiment has a complementary concavo-convex shape that is in close contact with the undulations on the outer surface of the artificial tooth 20 of the first denture base 10 and the remaining tooth 110 of the user. The flat surface is substantially free from protrusions. That is, the suction surface 32 of the second denture base 30 is so flat that it does not have a convex portion that enters the first denture base 10 beyond the alveolar crest 124 (see FIG. 5B). For this reason, the first denture base 10 and the second denture base 30 are unlikely to accumulate eating meals and are excellent in cleaning properties. In the present embodiment, the suction surface 32 is a flat surface includes a flat surface having no unevenness or a smooth curved surface, and a curved surface having small unevenness that does not reach the alveolar crest 124 at the center of the alveolar ridge 122. The same applies to the second and subsequent embodiments.

  As shown in FIG. 4, the flat magnetic pole surfaces of the plurality of permanent magnets 24 are exposed on the outer surface of the attracting surface 12 of the first denture base 10 at positions separated in the dentition direction. That is, the magnetic pole surface of the permanent magnet 24 is provided flush with the attracting surface 12 having a curved surface shape imitating a human gum, and the keeper 34 has an artificial gingiva portion 40 having a curved surface shape imitating a human gum. It is provided flush with the suction surface 32. Thereby, the attracting surfaces 12 and 32 can be magnetically attracted without the permanent magnet 24 and the keeper 34 projecting from the attracting surfaces 12 and 32. The plurality of permanent magnets 24 are provided on both sides of the artificial tooth 20 with the gingival papilla 42 or the interpapillary recess 44 interposed therebetween. The gingival papilla 42 is a region between the adjacent artificial teeth 20 in the denture base 11 of the first denture base 10, and the gingiva extends in a nipple shape between adjacent teeth in the human oral cavity. It imitates the part that is. The interpapillary recess 44 is a portion between the gingival papilla 42 in the denture base 11 of the first denture base 10 and a portion where the gingiva recedes into a concave shape at the root of the crown in a human oral cavity. Is imitated. In the first denture base 10 of the present embodiment, permanent magnets 24 are disposed on both sides of the inter-nipple recess 44 corresponding to each of the plurality of artificial teeth 20. In the first denture base 10 of the present embodiment, three or more (specifically, four) artificial teeth 20 are arranged side by side with no gap in the dentition direction. Permanent magnets 24 are respectively arranged at intermediate positions between the outermost artificial teeth 20 of the plurality of the side by side and the other artificial teeth 20 adjacent to the inner sides thereof.

  The second denture base 30 includes keepers 34 at positions corresponding to the permanent magnets 24 and has a length that covers up to one remaining tooth 110 adjacent to the outside of the side-by-side artificial teeth 20. Is formed. The artificial gingiva part 40 has a plurality of gingival recesses 46 into which the artificial tooth 20 and the remaining tooth 110 are fitted. Since the permanent magnet 24 is arranged in the vicinity of the outermost artificial tooth 20 among the plurality of side-by-side artificial teeth 20, the magnetic force attracting force between the permanent magnet 24 and the keeper 34 reaches the both ends of the artificial gingival part 40. It reaches. For this reason, the artificial gingiva part 40 latched to the undercut part 112 of the remaining tooth 110 does not easily fall off from the first denture base 10.

  Here, the undercut portion 112 of the remaining tooth 110 will be described. Among human teeth, the boundary between the crown on the tip side and the root on the root side is called the cervical line. A human tooth has a concave tooth neck portion that is constricted in a circular shape from the most swollen portion of the crown to the neck line of the incisor (anterior tooth) and molar (back tooth). The molars stand upright on both the upper and lower jaws in parallel or slightly inwardly (lingually) with respect to the vertical movement direction (occlusion direction) of the jaw. In contrast, incisors, particularly maxillary central incisors and maxillary incisors, stand up slightly inclined outward (buccal side: labial side) with respect to the occlusal direction. The undercut portion 112 of the remaining tooth 110 referred to in the present embodiment refers to a region from the most swollen portion to the root of the tooth on the mounting side (outside in the present embodiment) of the second denture base 30 in the crown. In other words, when the remaining tooth 110 is projected in the occlusal direction, a partial region that becomes a shadow on the mounting side of the second denture base 30 is referred to as an undercut portion 112. When the remaining tooth 110 stands up in parallel with the occlusal direction, the vicinity of the tooth neck corresponds to the undercut portion 112. When the remaining tooth 110 is a protruding tooth and the tip protrudes outward, substantially the entire crown other than the tip becomes the undercut portion 112. The undercut portion 112 of the present embodiment includes a tooth neck portion and a partial region on the tip side of the tooth neck portion of the tooth crown. The same applies to the undercut portions 112 in the second and subsequent embodiments.

  As shown in FIG. 3, when the keeper 34 of the second denture base 30 is magnetically attracted to the permanent magnet 24 of the first denture base 10, the artificial gingiva part 40 remains adjacent to both sides of the four artificial teeth 20. It contacts the undercut portion 112 of the tooth 110. When the artificial gingiva portion 40 abuts against the undercut portion 112 from the root side to the distal end side of the remaining tooth 110, the second denture base 30 is locked to the remaining tooth 110. This prevents the first denture base 10 integrated with the second denture base 30 from being detached from the alveolar ridge.

  FIG. 5A is a cross-sectional view taken along line AA in FIG. 3, and is a vertical cross-sectional view showing a state in which the tip of the artificial gingival part 40 of the second denture base 30 is locked to the undercut part 112 of the remaining tooth 110. It is. FIG. 5A shows a state in which the artificial gingival part 40 is locked to the cervical part of the undercut part 112 in particular. FIG. 5B is a cross-sectional view taken along the line B-B in FIG. 3, and is a vertical cross-sectional view of the first denture base 10 and the second denture base 30 cut by a cut surface passing through the permanent magnet 24 and the keeper 34.

  When the annular clasp 14a is attached to the remaining tooth 110 (molar tooth), the annular clasp 14a needs to pass through the molar crown. In order to prevent the annular clasp 14a from easily falling off, it is preferable to attach the annular clasp 14a to a tooth neck portion that is narrower and undercut than the crown. For this reason, as shown in FIG. 1 and FIG. 2, the annular clasp 14a is formed in an open annular shape that can be easily elastically deformed, and can pass through the crown of the remaining tooth 110 (molar tooth). However, the open annular clasp 14a can be easily removed from the tooth neck, and it is difficult to firmly attach the first denture base 10 to the alveolar ridge 122 (see FIG. 2) only by the annular clasp 14a. . On the other hand, the second denture base 30 is magnetically adsorbed to the first denture base 10 from the outside (cheek side) and locked to the undercut portion 112 such as the tooth neck as in the present embodiment, and easily and The partial denture 100 can be firmly fixed to the alveolar ridge 122.

  As shown in FIG. 5B, the suction surface 12 of the first denture base 10 and the suction surface 32 of the second denture base 30 project the gingival part that supports the root portion 25 of the artificial tooth 20, and the protrusion of the artificial tooth 20. It is a cut surface cut at a middle position in the thickness direction of the gingival part by a plane or curved surface substantially parallel to the direction. The protruding direction of the artificial tooth 20 is a direction from the root portion 25 of the artificial tooth 20 toward the tip portion 26, and is the vertical direction of FIG.

<Second embodiment>
FIG. 6 is a perspective view showing a state in which the partial denture 100 of the second embodiment is mounted on the jaw model 120. FIG. 7 is an exploded perspective view of the first denture base 10, the second denture base 30, and the jaw model 120 of the present embodiment. FIG. 8 is a front view of the partial denture 100 of the present embodiment mounted on the jaw model 120. FIG. 9 is a front view showing a state in the middle of separating the second denture base 30 from the partial denture 100 of the present embodiment mounted on the jaw model 120. 8 and 9 exemplify the upper jaw model 120, the partial denture 100 of this embodiment can be used for both the upper jaw and the lower jaw.

  In the partial denture 100 of the first embodiment, the artificial gingiva part 40 of the second denture base 30 is mounted so as to straddle the two remaining teeth 110 on both outer sides of the artificial tooth 20 of the first denture base 10. . On the other hand, in the partial denture 100 of the second embodiment, the artificial gingiva part 40 of the second denture base 30 is mounted so as to straddle each of the one or more artificial teeth 20a and 20b on both outer sides of the remaining tooth 110. Is done.

  That is, the first denture base 10 of the present embodiment includes artificial teeth 20a and 20b on both sides in the dentition direction with the remaining teeth 110 interposed therebetween. The second denture base 30 is provided with an artificial gingival portion 40 having a length extending over the artificial teeth 20a and 20b on both sides sandwiching the remaining tooth 110. The second denture base 30 is provided with magnets or magnetic bodies (keepers 34) at positions corresponding to the artificial teeth 20a and 20b, respectively.

  The suction surface 12 of the first denture base 10 is locally provided in the vicinity of the permanent magnet 24. The suction surface 32 of the second denture base 30 is a local region in the vicinity of the keeper 34 on the inner surface of the artificial gingival part 40.

  Permanent magnets 24 are provided in the vicinity of the artificial teeth 20a and 20b arranged adjacent to the remaining teeth 110, respectively. The second denture base 30 of the present embodiment is created with a length extending over the artificial teeth 20a and 20b. Keepers 34 are respectively provided in the vicinity of both ends of the artificial gingival part 40 of the second denture base 30. The artificial gingival part 40 has a plurality of gingival recesses 46 into which the plurality of remaining teeth 110 are individually fitted, inside the keeper 34 provided at both ends. When the keeper 34 and the permanent magnet 24 are attracted by magnetic force, the gingival recess 46 comes into contact with the undercut portion 112 of the remaining tooth 110. The second denture base 30 of the present embodiment engages with three or more remaining teeth 110 arranged in the dentition direction. The force for peeling off the first denture base 10 from the alveolar ridge 122 is distributed and applied to the three or more remaining teeth 110 via the second denture base 30. For this reason, high mounting strength can be obtained.

  Moreover, the partial denture 100 of this embodiment is different from the first embodiment in that a plurality of second denture bases 30 are attached to and used for one first denture base 10.

  When the second denture base 30 is mounted on the first denture base 10, a plurality of keepers 34 may be simultaneously attracted to the permanent magnet 24, but the keepers 34 may be sequentially attracted to the permanent magnet 24 one by one. . FIG. 9 shows a state in which only the back keeper 34 a is attracted to the permanent magnet 24. In this way, after the first denture base 10 and the second denture base 30 are adsorbed on the back tooth side, the other keeper 34b is moved to the permanent magnet while rotating the second denture base 30 with the keeper 34a as a fulcrum. 24 may be adsorbed. Thereby, there is no mounting defect of the second denture base 30, and the keepers 34a and 34b can be reliably attracted to the permanent magnet 24. The same applies when removing the second denture base 30 from the first denture base 10. After sliding the end portion of the artificial gingival portion 40 having one keeper 34 (for example, the keeper 34b on the front teeth side) to separate the keeper 34 from the permanent magnet 24, the end portion is picked to form the second denture base 30. Pull it. Thereby, the other keeper 34 (keeper 34a) can be easily detached from the permanent magnet 24.

<Third embodiment>
FIG. 10 is a front view showing a state in which the second denture base 30 is separated from the partial denture 100 of the third embodiment attached to the jaw model 120. The second denture base 30 is not shown. 11 is a cross-sectional view taken along line XI-XI in FIG.

  In the partial denture 100 of the third embodiment, the first denture base 10 and the second denture base 30 are each provided with a groove 16 and a protrusion 36 that fits into the groove 16. It is different from the second embodiment and is common in other points. The concave groove 16 is formed on the side close to the remaining tooth 110 in the artificial tooth 20 a adjacent to the remaining tooth 110, and the end 18 is opened toward the remaining tooth 110.

  The concave groove 16 is cut on the suction surface 12 of the first denture base 10. The protruding portion 36 has a streak shape having a shape and a size that fits into the recessed groove 16, and is formed to protrude from the suction surface 32 of the second denture base 30. The depth direction of the concave groove 16 coincides with the normal direction of the magnetic pole surface of the permanent magnet 24 or includes a normal direction component of the magnetic pole surface. The protruding direction of the protrusion 36 corresponds to the depth direction of the concave groove 16, and in this embodiment, coincides with the normal direction of the surface of the keeper 34.

  It is preferable that the longitudinal direction of the concave groove 16 and the protrusion 36 includes a directional component in the dentition direction. The longitudinal direction of the groove 16 in the partial denture 100 of the present embodiment matches the dentition direction. The concave groove 16 is formed in the vicinity of the permanent magnet 24. Specifically, the artificial tooth 20 closest to the permanent magnet 24 and the artificial tooth 20 closest to the concave groove 16 are common. The second denture base 30 includes a plurality of protrusions 36. Specifically, the protrusions 36 are formed on both sides of the second denture base 30 in the dentition direction. The concave grooves 16 are formed at positions corresponding to the protrusions 36, that is, at a plurality of locations. The opening directions of the end portions 18 are opposite to each other in the plurality of concave grooves 16. Thereby, even if the second denture base 30 tries to move relative to the first denture base 10 in the dentition direction, one of the protrusions 36 is engaged and locked in the groove 16, This relative movement is restricted. On the other hand, even if the second denture base 30 tries to move relative to the first denture base 10 in the occlusal direction, the concave groove 16 is not opened in the occlusal direction, so that the plurality of protrusions 36 fit into the concave groove 16. Together, they are locked and this relative movement is restricted.

  As shown in FIG. 11, the concave groove 16 of the present embodiment is formed between the permanent magnet 24 and the undercut portion 27 in the artificial tooth 20. The tip of the artificial gingival part 40 is abutted and locked against the undercut part 27 of the artificial tooth 20.

  When the denture base 11 of the first denture base 10 is separated from the alveolar ridge 122, that is, when the denture base 11 is lifted from the alveolar ridge 122 in FIG. 11, the protrusion 36 fitted into the concave groove 16 of the denture base 11 is also Lifted. For this reason, the 2nd denture base 30 and the 1st denture base 10 maintain the state which adhered firmly. On the other hand, since the artificial gingival part 40 of the second denture base 30 is locked to the undercut part 112 of the remaining tooth 110 (second embodiment: see FIG. 8), the first denture base 10 is separated from the alveolar ridge 122. Do not leave. If the second denture base 30 is separated from the first denture base 10, the first denture base 10 can be detached from the alveolar ridge 122, but in order for the second denture base 30 to be separated from the first denture base 10, a permanent magnet 24 and the keeper 34 need to be separated from each other. Here, the magnet and the magnetic body slide easily with respect to each other in the plane of the joint surface (the magnetic pole surface of the magnet and the surface of the magnetic body), but are separated in the direction perpendicular to the joint surface (normal line). Requires a large force in the peeling direction. Therefore, in order to separate the magnet and the magnetic body, it is necessary to largely slide in the in-plane direction and shift both to reduce the area of the joint surface and reduce the attractive force. On the other hand, in this embodiment, the concave groove 16 is formed in the vicinity of the permanent magnet 24, and the protrusion 36 is fitted in the concave groove 16 toward the normal direction of the permanent magnet 24. The longitudinal direction of the groove 16 is the dentition direction, and the groove 16 and the protrusion 36 do not move relative to each other in the peeling direction of the first denture base 10. For this reason, even if it is going to peel the 1st denture base 10 from the alveolar ridge 122, the permanent magnet 24 and the keeper 34 do not mutually shift, and both do not separate. For this reason, the 1st denture base 10 and the 2nd denture base 30 are latched by the undercut part 112 of the residual tooth 110 in the state integrated firmly.

  As shown in FIG. 11, the depth of the recessed groove 16 and the protruding height of the protrusion 36 are as small as the thickness dimensions of the permanent magnet 24 and the keeper 34. The concave groove 16 is formed so shallow that it does not reach the alveolar crest 124 to which the denture base 11 is fitted, that is, the center of the alveolar ridge 122. In other words, the suction surface 32 of the second denture base 30 on which the protrusions 36 are formed is sufficiently flat and does not have a convex portion that enters the first denture base 10 beyond the alveolar crest 124. . The concave groove 16 is an open groove having an end 18 opened toward the remaining tooth 110. For this reason, the eating candy is hard to collect in the inside of the ditch | groove 16, and when the 1st denture base 10 is wash | cleaned or cleaned, the inside of the ditch | groove 16 will be easily cleaned.

  The concave groove 16 of the present embodiment is formed in the vicinity of each of the plurality of permanent magnets 24. However, in place of the present embodiment, the concave grooves 16 may not be formed in the vicinity of some of the permanent magnets 24.

  In the first to third embodiments, the large first denture base 10 having the artificial teeth 20 is mounted on the alveolar crest 124 of the alveolar ridge 122, and the second denture base 30 is a small piece and the first denture base 10. In order to prevent the detachment of the gingiva, an example in which the gingiva is used in close contact with the outer surface of the gingiva is illustrated. Instead of these embodiments, the first denture base 10 and the second denture base 30 are made with the same size, and the inner side (lingual side) and the outer side (cheek side) of the alveolar crest 124 of the alveolar ridge 122 are sandwiched. Each may be mounted (see the fifth embodiment).

  Moreover, although the said 1st to 3rd embodiment illustrated the aspect which mounts the 1st denture base 10 which has the artificial tooth 20 inside from the alveolar ridge 122 (tongue side), this invention is not limited to this. The first denture base 10 having the artificial teeth 20 may be disposed from the alveolar ridge 122 to the outside (the buccal side), and the second denture base 30 may be disposed on the inside (the lingual side) of the alveolar ridge 122. The artificial gingival part 40 may be locked inward to the remaining tooth 110 in which the undercut part 112 exists not only on the outer side (cheek side) but also on the inner side (lingual side) like a molar. Furthermore, both the first denture base 10 and the second denture base 30 may be locked to the undercut portion 112 of the remaining tooth 110. When the residual tooth 110 is a molar, the denture base 11 of the first denture base 10 is locked to the undercut portion 112 inside the residual tooth 110, and the artificial gingiva part 40 of the second denture base 30 is further fixed to the residual tooth 110. The outer undercut portion 112 may be locked.

<Fourth embodiment>
FIG. 12A is a perspective view of the partial denture 100 of the fourth embodiment attached to the jaw model 120. FIG. 12B is a perspective view showing a state in the middle of separating the second denture base 30 from the partial denture 100 of the present embodiment mounted on the jaw model 120. FIG. 13 is a perspective view showing a state in which the partial denture 100 of the present embodiment is separated into a first denture base 10 and a second denture base 30.

  The partial denture 100 of this embodiment is a one-side free end denture that is attached to the free end missing part. The first denture base 10 has a collar portion (clasp 14) that is used by being hooked on the remaining tooth 110. The second denture base 30 has artificial molars 22 corresponding to the innermost teeth. The innermost tooth is the second molar or the third molar.

  One or more artificial teeth 20 are erected on the denture base 11 of the first denture base 10. In the present embodiment, one artificial tooth 20 is provided on the denture base 11. The artificial tooth 20 of this embodiment corresponds to a second molar. The artificial molar 22 of the second denture base 30 corresponds to a third molar. A keeper 34 a is mounted on the back surface of the artificial molar 22.

  As shown in FIG. 13, the first denture base 10 includes a first magnetic body 24 a and a second magnetic body 24 b that are magnets or magnetic bodies. The first magnetic body 24a and the second magnetic body 24b are substantially perpendicular to each other in the perpendicular direction. As indicated by the arrow, the first magnetic body 24 a is adsorbed to another magnetic body or magnet (keeper 34 a) provided on the back surface of the artificial molar 22. The second magnetic body 24b is attracted to the other keeper 34b.

  More specifically, the first magnetic body 24a and the second magnetic body 24b are permanent magnets. On the second denture base 30, a keeper 34a is mounted at a position corresponding to the first magnetic body 24a, and a keeper 34b is mounted at a position corresponding to the second magnetic body 24b. The magnetic pole surface of the first magnetic body 24a faces the occlusal direction of the teeth in the same manner as the standing direction of the artificial teeth 20. The magnetic pole surface of the second magnetic body 24b faces outward from the tongue side toward the cheek side. That is, the magnetic pole surface of the first magnetic body 24a and the magnetic pole surface of the second magnetic body 24b are orthogonal to each other.

  As shown in FIG. 12 (b), the first denture base 10 is mounted on the jaw model 120 in a state where the clasp 14 is in contact with the remaining tooth 110 as a tooth. In this state, the artificial molar 22 is placed at the position of the third molar, and the keeper 34b is magnetically attracted to the first magnetic body 24a (see FIG. 13) of the first denture base 10. As a result, the second denture base 30 is rotatable about the artificial molar 22 as an axis. In this state, when the artificial gingiva part 40 is pressed against the artificial tooth 20 and the remaining tooth 110 as shown in FIG. 12A, the keeper 34 b arranged in the intermediate part of the artificial gingival part 40 causes the root of the artificial tooth 20. It attracts magnetic force to the second magnetic body 24b arranged on the side. The gingival recess 46 of the artificial gingival part 40 is brought into contact with and locked to the undercut part 112 of the remaining tooth 110. As a result, the first denture base 10 and the second denture base 30 are integrally fixed to form the partial denture 100, and are locked to the remaining teeth 110 to prevent dropping.

  As described above, in the first to fourth embodiments, the first denture base 10 includes the clasp 14 (the annular clasp 14a or the bar clasp 14b), but the present invention is not limited thereto.

<Fifth embodiment>
FIG. 14 is a front view of the partial denture 100 of the fifth embodiment attached to the jaw model 120. FIG. 15 is a front view showing a state in which the second denture base 30 is separated from the partial denture 100 of the present embodiment mounted on the jaw model 120. FIG. 16A is a front view of the first denture base 10 of the present embodiment. FIG. 16B is a front view of the second denture base 30 of the present embodiment. FIG.16 (c) is the XVI-XVI sectional view taken on the line of FIG.

  The partial denture 100 of the present embodiment does not have the clasp 14 and is used by being attached to a missing tooth portion like an incisor.

  The artificial tooth 20 is formed by integrally combining a plurality of divided teeth 21 a and 21 b formed in a distributed manner on the first denture base 10 and the second denture base 30. That is, both the first denture base 10 and the second denture base 30 of the present embodiment have artificial teeth 20. The suction surface 32 of the second denture base 30 is an inner surface of the artificial gingival part 40 and has a complementary shape in close contact with the suction surface 12 of the first denture base 10. The suction surface 12 of the first denture base 10 is the outer surface of the denture base 11. The magnetic pole surface of the permanent magnet 24 is arranged flush with the attracting surface 12, and the surface of the keeper 34 is arranged flush with the attracting surface 32, which is common to the first to fourth embodiments.

  The artificial tooth 20 of the present embodiment is divided and formed on the inner side (lingual side) and the outer side (cheek side) of the alveolar crest 124. Instead of this, it may be divided and formed in the dentition direction.

  The denture base 11 of the first denture base 10 is used in close contact with the alveolar ridge 122. Further, the denture base 11 is brought into close contact with the inner surface of the remaining tooth 110 adjacent to the partial denture 100 as shown in FIG. The partial denture 100 of this embodiment is configured by combining the first denture base 10 mounted on the alveolar ridge 122 so as to cover the second denture base 30.

  The artificial gingiva part 40 is formed on both outer sides in the dentition direction with the artificial tooth 20 (divided tooth 21b) interposed therebetween. When the permanent magnet 24 and the keeper 34 are magnetically attracted, the artificial gingiva 40 is brought into close contact with and locked to the outer surface of the undercut portion 112 (see FIG. 15) of the remaining tooth 110 adjacent to the partial denture 100. The This suppresses the partial denture 100 from being detached from the alveolar ridge 122.

  In the partial denture 100 of the present embodiment, a plurality (specifically, two) of permanent magnets 24 and keepers 34 are arranged side by side in the dentition direction (left-right direction in FIG. 14). The positions and orientations of the first denture base 10 and the second denture base 30 are fixed by magnetically attracting the plural pairs of permanent magnets 24 and the keeper 34.

  The plurality of divided teeth 21a and 21b engage with each other in the occlusal direction (vertical direction). As shown in FIG. 16 (c), an arrowhead-shaped collar portion 23 is integrally formed with the divided teeth 21 b of the second denture base 30. By covering the collar portion 23 on the divided teeth 21a, the occlusal force when chewed is transmitted from the collar portion 23 of the divided teeth 21b to the divided teeth 21a and becomes a force for pushing the divided teeth 21a. That is, the permanent magnet 24 and the keeper 34 do not shift due to the occlusal force. Since the occlusal force is distributed to the outer divided teeth 21b of the alveolar crest 124 of the alveolar ridge 122 and the inner divided teeth 21a, a stable masticatory force can be obtained. Further, since the ridge portion 23 covers the divided teeth 21a, the eating candy does not enter between the suction surface 12 and the suction surface 32.

  In the above-described embodiment, a mode has been described in which a plurality of pairs of magnets or magnetic bodies that are magnetically attracted to each other are arranged at positions separated in the dentition direction. Instead of the present embodiment, the first denture base 10 and the second denture base 30 may be magnetically adsorbed using only a pair of permanent magnets 24 and a keeper 34.

That is, this embodiment includes the following technical ideas.
A first denture base that is detachably attached to the inner side of the alveolar crest in the alveolar ridge having the remaining teeth, and is detachably attached to the outer side of the alveolar crest and is separably adsorbed to the first denture base. A partial denture comprising a second denture base and having the following requirements (a) to (d):
(A) The first denture base and the second denture base each have a suction surface provided with a pair or a plurality of pairs of magnets or magnetic bodies that magnetically attract each other;
(B) The partial denture has an artificial tooth configured by integrally combining a plurality of divided teeth dispersedly formed on the first denture base and the second denture base;
(C) One or both of the first denture base and the second denture base have an artificial gingival part extending outward in the dentition direction from the artificial tooth;
(D) The remaining tooth adjacent to the artificial tooth by adsorbing the other denture base with one of the first denture base and the second denture base mounted on the alveolar ridge with the magnetic force or the magnetic material. The artificial gingival portion is locked to the undercut portion, and the first denture base and the second denture base are prevented from separating from the alveolar ridge.

  According to the partial denture, a stable masticatory force can be obtained because the occlusal force is distributed and applied to the outer and inner divided teeth of the alveolar crest. In addition, by locking the artificial gingival part to the undercut part of the remaining tooth, it is possible to prevent the first denture base and the second denture base from detaching from the alveolar ridge. There is no need to stand up, and there is no need to scrape the remaining remaining teeth and cover the bridge. For this reason, such a partial denture can be attached to an alveolar ridge with a missing root, and the burden on the remaining teeth is small.

The present invention is not limited to the above-described embodiment, and includes various modifications and improvements as long as the object of the present invention is achieved.
For example, in the above embodiment, the magnetic pole surface of the permanent magnet 24 and the surface of the keeper 34 are exemplified to be flush with the attracting surfaces 12 and 32. However, the present invention is not limited to this. The magnetic pole surface of the permanent magnet 24 or the surface of the keeper 34 may slightly protrude from the attracting surfaces 12 and 32 so as not to reach the alveolar crest 124.

  The various constituent elements of the partial denture 100 of the present invention do not have to be independent of each other, but a plurality of constituent elements are formed as one member, and one constituent element is formed of a plurality of members. That a certain component is a part of another component, a part of a certain component overlaps a part of another component, and the like. That is, in the said embodiment, although illustrated that the 1st denture base 10 consisted of one component and the 2nd denture base 30 consisted of one or several components, this invention is not limited to this.

The above embodiment includes the following technical idea.
(1) A partial denture comprising a first denture base that is detachably attached to an alveolar ridge having residual teeth and a second denture base that is separably adsorbed to the first denture base. The first denture base and the second denture base each have a plurality of pairs of magnets or magnetic bodies that are magnetically attracted to each other, each having an attracting surface provided at a corresponding position spaced apart in the dentition direction, The first denture base or the second denture base has an artificial tooth and an artificial gingival part extending outward in the dentition direction from the artificial tooth, and the first denture base mounted on the alveolar ridge and the By magnetically adsorbing a second denture base with a plurality of pairs of the magnets or the magnetic body, the position and orientation of the first denture base and the second denture base are regulated, and the undercut of the remaining tooth The artificial gingival part is locked to the first denture base Partial denture, characterized in that the fine said second denture is detached from the alveolar ridge can be suppressed.
(2) The artificial tooth is provided on the first denture base, the artificial gingival part is provided on the second denture base, and the artificial gingival part is disposed in both dentition directions with the artificial tooth interposed therebetween. The partial denture according to (1), which is formed with a length reaching the outside.
(3) The first denture base includes the artificial teeth on both sides in the dentition direction with the remaining teeth interposed therebetween, and the second denture base extends over the artificial teeth on both sides of the remaining teeth. The partial denture as described in (1) or (2) above, wherein the magnet or the magnetic body is provided at a position corresponding to the artificial tooth.
(4) From the above (1) to (3), the suction surface of the second denture base is formed so flat that it does not have a convex portion that enters the first denture base beyond the alveolar crest. ) Partial denture according to any one of the above.
(5) The first denture base and the second denture base each include a concave groove and a protrusion that fits into the concave groove, and the concave groove is adjacent to the remaining tooth. The partial denture according to any one of (1) to (4), wherein the denture is formed on a side close to the remaining tooth and has an end opened toward the remaining tooth.
(6) The artificial tooth according to any one of (1) to (5), wherein the artificial tooth is formed by integrally combining a plurality of divided teeth dispersedly formed on the first denture base and the second denture base. Partial denture.
(7) The partial denture according to (6), wherein the plurality of divided teeth engage with each other in the occlusal direction.
(8) The above-mentioned (1), wherein the first denture base has a buttock that is hooked on the remaining teeth, and the second denture base is an unilateral free-end denture having an artificial molar corresponding to the innermost tooth. To the partial denture according to any one of (7) to (7).
(9) The first denture base includes a first magnetic body and a second magnetic body that are the magnet or the magnetic body, and the first magnetic body and the second magnetic body are substantially perpendicular to each other. The partial denture according to (8), which is orthogonal to each other, and the first magnetic body adsorbs to the other magnetic body or magnet provided on the back surface of the artificial molar.

10: First denture base, 11: Denture base, 12.32: Adsorption surface, 14: Clasp, 14a: Annular clasp, 14b: Bar clasp, 16: Concave groove, 18: End, 20, 20a, 20b: Artificial Teeth, 21a and 21b: divided teeth, 22: artificial molars, 23: buttocks, 24: permanent magnet, 24a: first magnetic body, 24b: second magnetic body, 25: tooth root, 26: tip, 27: Undercut part, 30: second denture base, 34, 34a, 34b: keeper, 36: protrusion, 40: artificial gingival part, 42: gingival papilla, 44: interpapillary recess, 46: gingival recess, 100: part Denture, 110: Remaining teeth, 112: Undercut, 120: Jaw model, 122: Alveolar ridge, 124: Alveolar crest

Claims (9)

A partial denture comprising a first denture base that is used detachably attached to an alveolar ridge having a remaining tooth, and a second denture base that is separably adsorbed to the first denture base. ,
The first denture base and the second denture base each have a suction surface provided at a corresponding position where a plurality of pairs of magnets or magnetic bodies that magnetically attract each other are separated in the dentition direction,
The first denture base or the second denture base has an artificial tooth and an artificial gingival part extending outward in the dentition direction from the artificial tooth,
Position of the first denture base and the second denture base by magnetically adsorbing the first denture base and the second denture base mounted on the alveolar ridge with a plurality of pairs of the magnets or the magnetic body And the direction is restricted, and the artificial gingival part is locked to the undercut part of the remaining tooth, and the first denture base and the second denture base are prevented from being detached from the alveolar ridge. Characterized partial denture.   The artificial tooth is provided on the first denture base, the artificial gingival part is provided on the second denture base, and the artificial gingival part reaches both outer sides in the dentition direction with the artificial tooth interposed therebetween. The partial denture according to claim 1, which is formed of a length. The first denture base includes the artificial teeth on both sides in the dentition direction across the remaining teeth,
The second denture base includes the artificial gingival portion having a length extending over the artificial teeth on both sides sandwiching the remaining teeth, and the magnet or the magnetic body is provided at a position corresponding to each of the artificial teeth. Item 3. A partial denture according to item 1 or 2.   The said adsorption surface of said 2nd denture base is formed so flat that it does not have a convex part which goes into the inside of said 1st denture base beyond an alveolar crest. The partial denture as described in 1. The first denture base and the second denture base each include a concave groove and a protrusion that fits into the concave groove,
The said recessed groove is formed in the side which adjoins the said residual tooth in the said artificial tooth adjacent to the said residual tooth, and the edge part is open | released toward the said residual tooth. The partial denture as described in 1.   The partial denture according to any one of claims 1 to 5, wherein the artificial tooth is formed by integrally combining a plurality of divided teeth distributed and formed on the first denture base and the second denture base.   The partial denture according to claim 6, wherein the plurality of divided teeth engage with each other in the occlusal direction.   The first denture base is a unilateral free-end denture having a buttock that is used by being hooked to the remaining tooth, and the second denture base having an artificial molar corresponding to the innermost tooth. The partial denture according to claim 1. The first denture base includes a first magnetic body and a second magnetic body which are the magnet or the magnetic body, and the perpendicular directions of the first magnetic body and the second magnetic body are substantially orthogonal to each other. And
The partial denture according to claim 8, wherein the first magnetic body adsorbs to a magnetic body or a magnet provided on a back surface of the artificial molar.

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