JP2018201645A - Partial denture and plate component for partial denture - Google Patents

Abstract

To provide a partial denture of a structure that facilitates detachment/attachment between a first denture base and a second denture base and cleaning of a bearing part more easily.SOLUTION: A partial denture includes a first denture base 10 detachably mounted to an alveolar ridge and a second denture base detachably mounted to the first denture base 10. One of the first denture base 10 or the second denture base has a bearing part 30, and the other has a shaft body 50. The shaft body 50 comprises a shaft part 51 pivoted by being detachably locked to the bearing 30, and a swing rod part 52 provided at the tip of the shaft part 51. The bearing part 30 comprises: a pair of curved piece parts 31 curving in an arcuate manner, respectively; a gap part 32 formed between the curved piece parts 31; an introduction space part 33 serving as a movement space of the shaft part 51 to lock the shaft part 51 to the pair of curved piece parts 31; and an opening 34 for inserting the shaft part 51 into the introduction space part 33 from the outside of the bearing part 30.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a partial denture and a plate component for a partial denture.

  Dentures are roughly classified into complete dentures (total dentures) and partial dentures (partial dentures).

Patent Document 1 includes, as partial dentures, a first denture base that is detachably attached to the alveolar ridge and a second denture base that is detachably attached to the first denture base. The type of provision is described.
In the partial denture of Patent Document 1, the bearing-side denture base that is one of the first denture base or the second denture base includes a bearing portion and a first holding portion provided at a location different from the bearing portion. ,have. Moreover, the shaft main body side denture base which is the other of the first denture base or the second denture base is attached to the bearing portion so as to be detachably attached to the shaft main body having a shaft portion that is pivotally supported, and the first holding portion. And a corresponding second holding part.
In the partial denture of Patent Document 1, the bearing portion has an entrance / exit opening for the shaft portion to enter and exit, and the shaft portion is inserted into the bearing portion via the entrance / exit opening and pivotally supported. The second denture base is swingably attached to the second denture base, and the first holding portion and the second holding portion are held together, thereby swinging the second denture base with respect to the first denture base. Are now regulated.

Japanese Unexamined Patent Publication No. 2016-196

  However, according to the study of the inventor of the present application, there is still room for improvement in the technology of Patent Document 1 with respect to the ease of attaching and detaching the first denture base and the second denture base and the ease of cleaning the bearing portion. is there.

  The present invention has been made in view of the above problems, and a partial denture having a structure capable of more easily performing desorption between the first denture base and the second denture base and cleaning of the bearing portion, And the board component for partial dentures is provided.

According to the present invention, a partial denture comprising a first denture base that is detachably attached to an alveolar ridge and a second denture base that is detachably attached to the first denture base. Because
The bearing side denture base which is one of the first denture base or the second denture base has a bearing portion and a first holding portion provided at a location different from the bearing portion,
The shaft main body side denture base, which is the other of the first denture base and the second denture base, has the first denture base mounted on the shaft main body and the first denture base. A second holding part that is in a state of being held together with the holding part,
The shaft body includes a shaft portion that is pivotally supported by being detachably locked to the bearing portion, and the shaft portion is provided at a tip and extends orthogonally to the shaft portion. And a swinging heel part,
The shaft portion projects in both directions in the axial direction of the shaft portion from the tip of the swinging hook portion,
The bearing portion includes a pair of curved piece portions each curved in an arc shape, a gap portion formed between the pair of curved piece portions, and the shaft portion with respect to the pair of curved piece portions. An introduction space portion serving as a movement space of the shaft portion for locking, and an opening portion for inserting the shaft portion into the introduction space portion from the outside of the bearing portion,
The opening direction in the radial direction of each of the pair of curved piece portions faces the introduction space portion,
The size of the opening and the introduction space in the opening direction is larger than the outer diameter of the shaft portion,
The dimension of the opening and the introduction space in the direction in which the pair of curved pieces are aligned is larger than the dimension of the shaft in the axial direction of the shaft,
A partial denture in which the dimension of the gap in the direction in which the pair of curved pieces are arranged is larger than the outer diameter of the swinging hook.

Moreover, according to the present invention, a plate component for a partial denture that constitutes the bearing member of the partial denture of the present invention,
A first plate-shaped portion constituting the flat plate-shaped portion;
A pair of second plate-shaped portions that protrude in parallel with each other from the first plate-shaped portion and are bent to form the curved piece portion;
A plate component is provided.

  According to the present invention, the first denture base and the second denture base of the partial denture can be more easily detached and the bearing portion can be more easily cleaned.

Fig.1 (a) is a perspective view which shows the state before mounting the partial denture based on 1st Embodiment to a jaw model, FIG.1 (b) uses the partial denture based on 1st Embodiment as a jaw model. It is a perspective view which shows the mounted state. FIG. 2 is a perspective view showing a state in which the first denture base and the second denture base of the partial denture according to the first embodiment are separated from each other, and the front side and the back side of the second denture base are shown inverted. ing. It is a perspective view in the state where the 2nd denture base is equipped with the 1st denture base of the partial denture concerning a 1st embodiment, and the 1st maintenance part and the 2nd maintenance part are not mutually held. It is a perspective view in the state where the 2nd denture base was mounted to the 1st denture base of the partial denture concerning a 1st embodiment, and the 1st maintenance part and the 2nd maintenance part were mutually held. Fig.5 (a) is a perspective view of the bearing part of the partial denture based on 1st Embodiment, FIG.5 (a) is a perspective view which shows the state in which the bearing part was pivotally supported by the bearing part. FIG. 6A and FIG. 6B are cross-sectional views showing a series of operations for locking the shaft body to the bearing portion. FIG. 7A and FIG. 7B are cross-sectional views showing a series of operations for locking the shaft body to the bearing portion. 8 (a), 8 (b) and 8 (c) are cross-sectional views showing a series of steps for embedding the bearing member in the artificial gingiva of the bearing side denture base. 9 (a), 9 (b) and 9 (c) are cross-sectional views showing a series of steps for embedding the bearing member in the artificial gingiva of the bearing side denture base. FIG. 10A is a perspective view of the bearing member of the partial denture according to the first embodiment, and FIG. 10B is a perspective view showing a state where wax is placed on the bearing member. It is a top view which shows the state in which the bearing member of the partial denture based on 1st Embodiment is flat. Fig.12 (a) is a top view of the dummy shaft main body used for formation of the shaft main body of the partial denture based on 1st Embodiment, Fig.12 (a) is a perspective view of a dummy shaft main body. It is a top view which shows the state where the bearing member of the partial denture based on 2nd Embodiment is flat. It is a top view which shows the axial main body of the partial denture based on 2nd Embodiment. It is a perspective view of the bearing part of the partial denture based on 3rd Embodiment. It is a top view which shows the state where the bearing member of the partial denture based on 4th Embodiment is flat. It is a figure which shows the state by which the shaft main body was pivotally supported with respect to the bearing part of the partial denture based on 4th Embodiment. It is a top view which shows the state where the bearing member of the partial denture based on 5th Embodiment is flat. It is a top view which shows the state in which the bearing member of the partial denture based on 6th Embodiment is flat. It is a perspective view which shows the state by which the bearing member of the partial denture based on 6th Embodiment was curved. It is sectional drawing which shows the state by which the shaft main body was pivotally supported with respect to the bearing part of the partial denture based on 6th Embodiment.

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

[First Embodiment]
First, using FIG. 1 to FIG. 12A, a partial denture 100 according to the first embodiment and a plate component 40a for a partial denture according to the first embodiment (FIGS. 10A and 11). And will be described.

As shown in FIGS. 1 (a) and 1 (b), a partial denture 100 according to the present embodiment is used by being detachably mounted on an alveolar ridge 91 (FIG. 1 (a)). 10 and a second denture base 20 that is detachably mounted on the first denture base 10.
The bearing side denture base (in the case of this embodiment, the 1st denture base 10) which is one of the 1st denture base 10 or the 2nd denture base 20 is provided in the location different from the bearing part 30 and the bearing part 30. First holding unit 60 (FIG. 3).
The shaft main body side denture base (in the case of this embodiment, the second denture base 20) which is the other of the first denture base 10 or the second denture base 20 is the shaft main body 50 (FIG. 2) and the first denture base. 10 and a second holding part 70 (FIGS. 2 and 3) that are held together with the first holding part 60 in a state in which the second denture base 20 is attached to the terminal 10 (the state shown in FIG. 4). . The state in which the first holding unit 60 and the second holding unit 70 are held together is a state in which the first holding unit 60 and the second holding unit 70 are fixed to each other.
In the following description, as shown in FIG. 3, the shaft body 50 is pivotally supported by the bearing portion 30, but the first holding portion 60 and the second holding portion 70 are not held together (the first holding portion). The state where 60 and the second holding unit 70 are separated from each other may be referred to as a first state. In addition, as shown in FIG. 4, the state in which the shaft body 50 is pivotally supported by the bearing portion 30 and the first holding portion 60 and the second holding portion 70 are held together may be referred to as a second state.

As shown in FIG. 2, the shaft main body 50 includes a shaft portion 51 that is pivotally supported by being detachably locked to the bearing portion 30, and a shaft portion 51 that is provided at the tip and is And a swinging flange 52 extending orthogonally. The shaft portion 51 protrudes in both directions in the axial direction of the shaft portion 51 from the tip of the swinging flange portion 52.
As shown in FIG. 5A, FIG. 5B, FIG. 6A, FIG. 6B, and the like, the bearing portion 30 includes a pair of curved piece portions 31 and a pair of curved piece portions 31 that are curved in an arc shape. A gap portion 32 formed between the curved piece portions 31, an introduction space portion 33 serving as a moving space for the shaft portion 51 for locking the shaft portion 51 to the pair of curved piece portions 31, and And an opening 34 for inserting the shaft portion 51 into the introduction space portion 33 from the outside of the bearing portion 30.
For example, the curved piece portion 31 is curved in a semi-cylindrical shape, and more specifically, is curved in a semi-cylindrical shape. However, the bending piece portion 31 is not in a semi-cylindrical shape so that the direction of the axial center of the bending piece portion 31 (the direction from the front to the back in FIG. 6A, FIG. The width dimension in the direction from the front to the front) may be small. Further, the curved piece portion 31 is not limited to a semi-cylindrical shape or an arc shape, but may be a semi-square tube shape or an arc shape formed of a plurality of broken lines.
The opening direction in the radial direction of each of the pair of curved piece portions 31 (the right direction in FIG. 6A, FIG. 6B, FIG. 7A, FIG. 7B, etc.) is toward the introduction space portion 33. Facing. That is, the introduction space portion 33 is arranged in the opening direction in the radial direction of the curved piece portion 31 with the curved piece portion 31 as a reference.

The internal space of the curved piece portion 31 and the introduction space portion 33 are adjacent to each other and communicate with each other. For this reason, after arrange | positioning the axial part 51 in the introduction space part 33 as shown in FIG.6 (b), the axial part 51 is curved by moving the axial part 51 in the direction of the arrow shown in FIG.6 (b). The shaft portion 51 can be locked and pivotally supported by the curved piece portion 31 by being moved to the internal space of the piece portion 31.
Further, the gap 32, the introduction space 33 and the opening 34 are adjacent to each other and communicate with each other. For this reason, when the shaft portion 51 is locked and pivotally supported by the curved piece portion 31, the swinging flange portion 52 can be inserted into the gap portion 32.

Further, the dimensions of the opening 34 and the introduction space 33 in the opening direction are larger than the outer diameter of the shaft 51. That is, the dimensions of the opening 34 and the introduction space 33 in the left-right direction in FIG. 6A are larger than the outer diameter of the shaft 51.
The dimensions of the opening 34 and the introduction space 33 in the direction in which the pair of curved pieces 31 are arranged are larger than the dimension of the shaft 51 in the axial direction of the shaft 51. That is, the opening 34 and the introduction space in the direction from the front to the back of the paper surface in FIG. 6 (a), FIG. 6 (b), FIG. 7 (a), FIG. The dimension of the part 33 is larger than the longitudinal dimension of the shaft part 51.
Therefore, the shaft portion 51 can be introduced into the introduction space portion 33 through the opening 34.

Furthermore, the dimension of the gap portion 32 in the direction in which the pair of curved piece portions 31 are arranged is larger than the outer diameter of the swinging flange portion 52.
Therefore, as shown in FIGS. 7A, 7B, and 5B, the swinging flange portion 52 is provided in the gap portion 32 in a state where the shaft portion 51 is locked to the curved piece portion 31. It can be inserted.

  In the partial denture 100 having such a configuration, since the second denture base 20 is detachable from the first denture base 10, the first denture base 20 is removed from the first denture base 10 with the first denture base 20 removed. Each of the denture base 10 and the second denture base 20 can be cleaned. Particularly, each of the bearing portion 30 and the shaft main body 50 can be easily cleaned because of the details.

The introduction space 33 and the opening 34 have a dimension in the opening direction larger than the outer diameter of the shaft part 51, and a dimension in the arrangement direction of the pair of curved piece parts 31 is an axis in the axial direction of the shaft part 51. It is larger than the dimension of the part 51. Furthermore, the dimension of the gap portion 32 in the direction in which the pair of curved piece portions 31 are arranged is larger than the outer diameter of the swinging flange portion 52.
For this reason, as shown in FIGS. 6A to 6B, the axial direction of the shaft portion 51 (the direction from the front to the back of the page in FIG. 6 or the opposite direction) is a pair of curved piece portions 31. (The axis of the curved piece portion 31 extends in the direction from the front of the page to the back and the opposite direction in these drawings) (hereinafter referred to as a parallel state) Then, the shaft portion 51 is inserted into the introduction space portion 33 through the opening 34, and the shaft portion 51 is engaged with the pair of curved piece portions 31 as shown in FIGS. 7 (a) and 7 (b). It can be stopped and pivotally supported.
That is, it is not necessary to change the orientation of the shaft portion 51 in the process of locking and pivoting the shaft portion 51 to the pair of curved piece portions 31, so the shaft portion 51 is locked to the pair of curved piece portions 31 and the shaft. The operation | work which makes it support and mounts the 2nd denture base 20 with respect to the 1st denture base 10 can be performed easily. Moreover, about the operation | work which removes the 2nd denture base 20 from the 1st denture base 10, it carries out easily by performing the procedure contrary to the time of mounting | wearing the 2nd denture base 20 with respect to the 1st denture base 10. Can do.
Further, the bearing portion 30 has a simple structure, and the introduction space portion 33 of the bearing portion 30 communicates with the outside of the bearing portion 30 through the opening 34. For this reason, the bearing part 30 can be easily cleaned using an interdental brush or the like.
As described above, the attachment and detachment of the first denture base 10 and the second denture base 20 of the partial denture 100 and the cleaning of the bearing portion 30 can be easily performed.

  Details will be described below.

As shown in FIGS. 1 (a) and 1 (b), in this specification, the gum 93 refers to the gum that covers the root (not shown) of the remaining tooth 92, and the remaining tooth 92 that is continuous therewith. Includes gums that do not cover the roots. The gum 93 in the region where the remaining teeth 92 are missing has a bank-like portion that rises between the buccal side or lip side and the lingual side. In this specification, the bank-like portion is referred to as an alveolar bank 91.
As shown in FIGS. 1A and 1B, in the present embodiment, an example in which the partial denture 100 is mounted on the alveolar ridge 91 (FIG. 1A) of the lower jaw 90 will be described. That is, in the present embodiment, the first denture base 10 of the partial denture 100 is attached to the alveolar ridge 91 of the lower jaw 90. The present invention is not limited to this example, and the partial denture 100 (the first denture base 10 of the partial denture 100) may be attached to the upper alveolar ridge.
The partial denture 100 according to the present embodiment engages the partial denture 100 with a predetermined remaining tooth 92 or gum 93 of the user with the second denture base 20 attached to the first denture base 10. It is a partial denture used.
In addition, in the case of this embodiment, the partial denture 100 shows the example which is a partial denture of a back tooth. However, the present invention is not limited to this example, and the partial denture 100 may be a partial denture of the front tooth.

As shown in FIGS. 2 and 3 and the like, the first denture base 10 is composed of, for example, a main body portion 11 made of artificial gingiva, an artificial tooth 13 erected from the main body portion 11, and an artificial gingiva. And an inner clamping part 14 protruding from the main body part 11.
The artificial gingiva constituting the main body part 11 and the inner clamping part 14 is formed by imitating a human gum 93. The material constituting the artificial gingiva is not particularly limited. For example, the artificial gingiva may be a metal floor made of metal, a resin floor made of resin (resin), or a composite floor in which a resin is coated on the surface of the metal floor, or a combination thereof.
Although the material of the artificial tooth 13 is not specifically limited, For example, it can be set as a hard resin material.

  In addition, about the method of mounting | wearing the alveolar ridge 91 with the 1st denture base 10, it is the same as that of patent document 1. FIG. Moreover, you may fix the bottom face of the main-body part 11 to the alveolar ridge 91 using a commercially available denture stabilizer etc. as needed.

In a state where the first denture base 10 is mounted on the alveolar ridge 91, the inner clamping portion 14 is disposed on the inner side, that is, on the lingual side of the remaining tooth 92, and at the boundary (or the vicinity thereof) between the remaining tooth 92 and the gum 93 It is designed to engage.
The outer surface 12 which is the outer side surface of the main body 11, that is, the surface which becomes the buccal side or the lip side when the first denture base 10 is attached to the alveolar ridge 91, the bearing portion 30 and the first holding portion 60 Is provided.
More specifically, the outer surface 12 is formed with a recess 12a, and the bearing portion 30 and the first holding portion 60 are disposed in the recess 12a.
In addition, this invention is not restricted to this example, The bearing part 30 is provided in the inner side surface in the main-body part 11, ie, the surface which becomes the tongue side in the state in which the 1st denture base 10 was mounted | worn with the alveolar ridge 91. May be.

The structure of the first holding unit 60 is the same as that described in Patent Document 1.
In the case of the present embodiment, the first holding part 60 is constituted by a pair of wires 61 that are laid on the main body part 11 in parallel with each other. Examples of the metal material constituting the wire 61 include, but are not limited to, a corrosion-resistant metal such as stainless steel or titanium.
More specifically, a wire erection recess 12b is formed in a partial region in the recess 12a, and a pair of wires 61 are erected in the hollow in the wire erection recess 12b. Is embedded in the artificial gingiva constituting the main body 11.

  In this embodiment, although the example in which the artificial tooth 13 is provided only in the 1st denture base 10 among the 1st denture base 10 and the 2nd denture base 20, the artificial tooth 13 is provided also in the 2nd denture base 20. It may be provided.

The 2nd denture base 20 is provided with the metal part 22 which has the axis | shaft main body 50 and the 2nd holding | maintenance part 70 integrally, for example. The metal portion 22 includes a shaft main body 50, a base portion 23 in which the shaft main body 50 is integrally formed on one end side, and a second holding portion 70 formed integrally on the inner side surface of the base portion 23. I have. The shaft main body 50 protrudes from the base portion 23.
Further, the second denture base 20 includes an artificial gingival part 21 that covers an outer side surface (a surface on the cheek side or lip side) of the base part 23. The artificial gingival material constituting the artificial gingival part 21 is the same as the artificial gingival material constituting the main body part 11 and the inner clamping part 14 of the first denture base 10.

The structure of the second holding unit 70 is the same as that described in Patent Document 1.
In the case of the present embodiment, the second holding part 70 is a fixed button provided integrally with the inner surface of the metal part 22.
The second holding portion 70 that is a fixed button includes, for example, a base 72, a constricted portion 74 formed on the base 72, and a protrusion 73 formed on the constricted portion 74. The constricted part 74 has a smaller diameter than the base part 72. The outer diameter of the constricted portion 74 is set to a dimension that is equal to or slightly larger than the distance between the pair of wires 61. The protrusion 73 has a larger diameter than the constricted part 74, but has a smaller diameter than the base 72. The protrusion 73 has a larger diameter than the distance between the pair of wires 61 constituting the first holding unit 60.

  As shown in FIG. 3, after the shaft body 50 is pivotally supported by the bearing portion 30 to be in the first state described above, the second denture base 20 is swung and the protrusions 73 of the second holding portion 70 are paired. The second state (the state shown in FIG. 4) can be achieved by pushing between the wires 61 and sandwiching the constricted portion 74 between the pair of wires 61.

In order to mount the partial denture 100, first, the partial denture 100 is set to the first state outside the oral cavity. In the first state, the second denture base 20 can swing with respect to the first denture base 10 with the shaft portion 51 of the shaft body 50 as a swing shaft.
Next, in a state where the second denture base 20 is swung and the second holding portion 70 is brought close to the first holding portion 60, the partial denture 100 is inserted into the oral cavity, and the bottom surface of the main body portion 11 is placed on the alveolar ridge 91. Installing. At this time, the inner clamping portion 14 of the first denture base 10 is disposed on the inner side, that is, the lingual side of the remaining tooth 92 and is engaged with the boundary (or the vicinity thereof) between the remaining tooth 92 and the gum 93.
Next, the second denture base 20 is further swung, and the protrusion 73 of the second holding portion 70 is pushed between the pair of wires 61 to obtain the second state. In the second state, the swing of the second denture base 20 with respect to the first denture base 10 is restricted. In this state, the outer clamping part 24 of the second denture base 20 protrudes from the main body part 11 of the first denture base 10 in parallel with the inner clamping part 14 of the first denture base 10, and is outside the remaining teeth 92. It is located on the buccal side or the lip side, and engages with the boundary (or the vicinity thereof) between the remaining tooth 92 and the gum 93 (state shown in FIG. 1B).
Thus, the remaining teeth 92 are clamped from the inside and outside by the inner clamping portion 14 and the outer clamping portion 24, and the partial denture 100 is stably attached to the alveolar ridge 91.
In addition, the 2nd denture base 20 does not straddle the alveolar ridge 91, but is arrange | positioned at the cheek side or the lingual side (this embodiment cheek side).

The partial denture 100 includes a bearing member 40 that integrally includes a pair of curved piece portions 31 as shown in FIG. 5A, FIG. 6A, and the like. In the case of this embodiment, the bearing member 40 is formed in the shape shown in FIG. The bearing member 40 is embedded in the artificial gingiva constituting the bearing side denture base (the first denture base 10 in the present embodiment).
That is, the bearing member 40 is embedded in the main body 11. However, at least a part of each curved piece portion 31 is exposed from the main body portion 11, and the shaft portion 51 can be locked and pivotally supported with respect to each curved piece portion 31. In the case of the present embodiment, the entire curved piece portion 31 is exposed from the main body portion 11.

  In the case of this embodiment, a pair of curved piece part 31 is arrange | positioned mutually coaxially. Further, the pair of curved piece portions 31 are formed in the same shape. The whole of the pair of curved piece portions 31 is exposed from the main body portion 11.

The bearing member 40 includes a flat plate-like portion 35 that is parallel to the axis of the pair of curved piece portions 31, and the flat plate-like portion 35 is an end of each of the pair of curved piece portions 31 in the circumferential direction. It is connected to the edge in the tangential direction of the edge.
The planar shape of the flat plate portion 35 is not particularly limited, but in the present embodiment, the flat plate portion 35 is rectangular. A pair of curved piece portions 31 are connected to one side of the flat plate portion 35.

In the case of the present embodiment, for example, the flat plate portion 35 is embedded in the main body portion 11 in the thickness direction of the flat plate portion 35, and faces the introduction space portion 33 in the flat plate portion 35 (FIG. 6). Only the upper surface in (a) is exposed from the main body 11.
However, only a part of the flat plate portion 35 in the thickness direction of the flat plate portion 35 may be embedded in the main body portion 11, or the entire flat plate portion 35 may be exposed from the main body portion 11.

As shown in FIG. 10A, the bearing member 40 includes a first anchor piece 36 that is connected to the flat plate portion 35. The 1st anchor piece 36 is formed in the shape which spreads as it goes to the protrusion direction of the said 1st anchor piece 36 from the flat plate-shaped part 35, and is a bearing side denture base (in the case of this embodiment, the 1st denture base 10). It is embedded in the artificial gingiva that constitutes That is, the first anchor piece 36 is embedded in the main body 11 as shown in FIG.
Since the 1st anchor piece 36 is formed in the shape which spreads as it goes to the protrusion direction from the flat plate-shaped part 35, the favorable anchor property with respect to the main-body part 11 is realizable.

In the case of the present embodiment, in the flat plate-like portion 35, the first anchor piece 36 protrudes from the side facing the side where the pair of curved piece portions 31 are connected.
However, the present invention is not limited to this example, and the first anchor piece 36 may protrude from the other side of the flat plate portion 35.

  The first anchor piece 36 may be bent with respect to the flat plate portion 35, or may be disposed on the same plane as the flat plate portion 35. In the case of this embodiment, as shown in FIG. 6A and FIG. 10A, the first anchor piece 36 is bent to the surface side facing the introduction space 33 in the flat plate portion 35.

Furthermore, as shown in FIG. 10A, the bearing member 40 includes a second anchor piece 37 that is connected to an end of the curved piece portion 31 opposite to the flat plate portion 35 side in the circumferential direction. It is configured. The 2nd anchor piece 37 is embed | buried under the artificial gingiva which comprises the bearing side denture base (in the case of this embodiment, the 1st denture base 10). That is, the second anchor piece 37 is embedded in the main body 11 as shown in FIG.
More specifically, in the curved piece portion 31, the second anchor piece 37 protrudes from the side opposite to the gap portion 32 side.

  The 2nd anchor piece 37 is formed in the shape which spreads as it goes to the protrusion direction of the said 2nd anchor piece 37 from the curved piece part 31. As shown in FIG. For this reason, the favorable anchor property with respect to the main-body part 11 is realizable.

  The second anchor piece 37 may be bent with respect to the end opposite to the flat plate-like part 35 in the circumferential direction of the curved piece 31, and is disposed on substantially the same plane as the end. May be. In the case of this embodiment, as shown in FIGS. 6A and 10A, the second anchor piece 37 is bent toward the flat plate portion 35 side.

Here, the bearing member 40 can be manufactured using the plate component 40a shown in FIG.
This plate component 40a is a plate component 40a for a partial denture that constitutes the bearing member 40 of the partial denture 100 according to this embodiment, and includes a first plate-like portion 41 that constitutes a flat plate-like portion 35, and A pair of second plate-like portions 42 that protrude from the one plate-like portion 41 in parallel and constitute the curved piece portion 31 by being bent respectively are provided.

Further, the plate component 40 a includes the first anchor piece 36 and the second anchor piece 37 described above.
The plate component 40a has a flat plate shape in the state shown in FIG.
The first plate-like portion 41 and each second plate-like portion 42 are each formed in a rectangular shape, for example.
Moreover, the 1st anchor piece 36 and the 2nd anchor piece 37 are each formed in trapezoid shape, for example.

The bearing member 40 shown in FIG. 10A can be manufactured by bending the pair of second plate-like portions 42 of the plate component 40a shown in FIG. 11 in an arc shape. In the state shown in FIG. 10A, the pair of second plate-like portions 42 of the plate component 40 a are each curved in an arc shape to form the curved piece portion 31.
It is preferable that the inner diameter of the curved piece portion 31 is equal to the outer diameter of the shaft portion 51 or slightly larger than the outer diameter of the shaft portion 51.

The material of the bearing member 40 can be appropriately selected from metals that can be used in the oral cavity. Examples of the metal include, but are not limited to, a corrosion-resistant metal such as stainless steel or titanium, or an alloy made of gold, silver, palladium, or a combination of two or more thereof.
The thickness of the plate component 40a that constitutes the bearing member 40 is not particularly limited, and can be set as appropriate within a range that functions as a bearing of the shaft portion 51 when the bearing portion 30 is constituted.

As shown in FIG. 2, the shaft main body 50 includes a position deviation restricting portion 53 in addition to the shaft portion 51 and the swinging flange portion 52 described above.
The structure of the shaft main body 50 is the same as the structure of the right end portion of the dummy shaft main body 80 (described later) shown in FIGS. 12 (a) and 12 (b) in FIGS. 12 (a) and 12 (b). .
The shaft portion 51 is formed in a bar shape similar to the dummy shaft portion 81 of the dummy shaft body 80, and in the case of this embodiment, is formed in a round bar shape. Both end surfaces in the axial direction of the shaft portion 51 are flat surfaces orthogonal to the axial direction, for example.
Further, the swinging hook part 52 is formed in a bar shape similar to the dummy swinging hook part 82 of the dummy shaft body 80, and in the case of this embodiment, it is formed in a round bar shape. The swinging hook part 52 is orthogonal to the shaft part 51. In addition, the outer diameter of the swinging hook part 52 is set to be equal to the outer diameter of the shaft part 51, for example.
The misregistration restricting portion 53 is formed in a bar shape similar to the dummy restricting shaft portion 83 of the dummy shaft main body 80, for example, and is formed in a round bar shape in the present embodiment.
The axial direction of the positional deviation restricting portion 53 is arranged in parallel to the axial direction of the shaft portion 51. Both end surfaces in the axial direction of the positional deviation restricting portion 53 are, for example, flat surfaces orthogonal to the axial direction.
In the case of this embodiment, the positional deviation restricting portion 53 is formed in the same shape and size as the shaft portion 51 and is arranged in parallel with the shaft portion 51.
The shaft portion 51 protrudes bidirectionally from the tip of the swinging flange portion 52. The misregistration restricting portion 53 protrudes bidirectionally from the swinging collar 52 at a position spaced from the shaft 51 in the axial direction of the swinging collar 52.
The distance between the shaft portion 51 and the positional deviation restricting portion 53 in the axial direction of the swinging flange portion 52 is set to a distance that is equal to or slightly larger than the thickness of the curved piece portion 31. Has been.

  Here, an example in which the shaft main body 50 includes the rod-shaped misregistration restricting portion 53 is shown. The shape of the positional deviation restricting portion 53 is not limited to this example.

  Next, an example of an operation for mounting the second denture base 20 on the first denture base 10 will be described in detail.

First, for example, as indicated by an arrow in FIG. 6A, the shaft 51 is axially parallel to the axis of the pair of curved piece portions 31 (in a parallel state) via the opening 34. Then, the shaft portion 51 is introduced into the introduction space portion 33 to be in the state shown in FIG.
At this time, the direction in which the shaft portion 51 is moved relative to the curved piece portion 31 is the opening direction in the radial direction of the curved piece portion 31 (the right direction in FIG. 6A and the like) and the curved piece portion 31. Axis center (the axis of the curved piece portion 31 extends in the direction from the front to the back of the page in FIG. 6A and the opposite direction) and the opposite (for example, orthogonal). Direction.

Next, for example, as indicated by an arrow in FIG. 6B, the shaft portion 51 is moved in the opposite direction to the opening direction (left direction in FIG. 6B, etc.) while maintaining the parallel state. Accordingly, as shown in FIG. 7A, the shaft portion 51 is moved from the introduction space portion 33 to the internal space of the bending piece portion 31. As a result, the shaft portion 51 is locked and pivotally supported by the pair of curved piece portions 31, and the swinging flange portion 52 is inserted into the gap portion 32 between the pair of curved piece portions 31.
In addition, the state of Fig.7 (a) is said 1st state, and is equivalent to the state of FIG.

  Next, for example, as shown by an arc-shaped arrow in FIG. 7A, the swinging collar 52 is swung around the shaft 51, and the result is as shown in FIGS. 7B and 5B. As shown, the swinging collar 52 is inserted deeper into the gap 32. Here, the entire second denture base 20 including the shaft portion 51 is swung relative to the entire first denture base 10 including the curved piece portion 31.

Further, in the process of swinging the swinging collar 52 from FIG. 7A to FIG. 7B and FIG. 5B, the protrusion 73 of the fixed button constituting the second holding unit 70 is The first holding portion 60 is pushed between a pair of wires 61 so that the constricted portion 74 is sandwiched between the pair of wires 61.
That is, by setting the first holding unit 60 and the second holding unit 70 to be held together, the swing of the second denture base 20 with respect to the first denture base 10 is regulated. Thereby, it can be set as said 2nd state (state of FIG. 4).
Here, FIG. 7B and FIG. 5B show an example in which the swinging hook part 52 is swung until the swinging hook part 52 is parallel to the flat plate-like part 35 in the second state. However, the swinging hook part 52 may be in the second state just before the swinging hook part 52 is parallel to the flat plate part 35, and the swinging hook part 52 may stop swinging. The second state may be established by swinging the swinging hook part 52 beyond the state in which it is parallel to the flat plate part 35, and the swinging of the swinging hook part 52 may be stopped.

  Note that the operations shown in FIGS. 6B to 7A and the operations shown in FIGS. 7A to 7B may be performed in parallel. That is, in these drawings, the swinging collar 52 may be swung around the shaft 51 while moving the shaft 51 to the left.

  Moreover, the operation | movement which removes the 2nd denture base 20 from the 1st denture base 10 can be performed in the reverse procedure of the operation | movement which mounts the 2nd denture base 20 with respect to the 1st denture base 10. FIG.

  Next, an example of a method for embedding the bearing member 40 in the main body portion 11 of the first denture base 10 will be described.

First, before embedding the bearing member 40 in the main body 11, for example, as shown in FIG. 10B, wax 43 is placed on the bearing member 40. That is, as shown in FIG. 10A, the wax 43 is placed on the bearing member 40 produced by bending the plate component 40a.
More specifically, at least the flow state resin 112 (FIG. 8C), which will be described later, does not enter the portion serving as the introduction space portion 33, the internal space of the curved piece portion 31, and the gap portion 32. Wax 43 is arranged to occupy the space. At this time, the pair of curved piece portions 31 are embedded in the wax 43, and the first anchor piece 36 and the second anchor piece 37 are exposed from the wax 43.
Here, when the flat plate-like portion 35 is rectangular as in the present embodiment, the region where the wax 43 should be placed can be easily recognized, and the wax 43 can be placed easily and appropriately.

Further, for example, as shown in FIG. 8A, an embedding recess 111 for embedding the bearing member 40 is formed on the outer surface 12 side of the main body 11.
Next, as shown in FIG. 8B, the bearing member 40 on which the wax 43 is arranged is disposed in the recessed portion 111 for embedding.
Next, as shown in FIG. 8C, the fluid state resin 112 is supplied around the bearing member 40 on which the wax 43 is placed using a brush or the like. As the fluid state resin 112, a resin material that cures at room temperature when left for a while (for example, about 10 minutes) can be used.
For this reason, after waiting for a while after the state of FIG. 8C, as shown in FIG. 9A, the fluid state resin 112 is integrated with the surrounding resin constituting the main body 11, and the bearing member 40 is It will be in the state embedded in the main-body part 11. FIG.
Contrary to the above, after supplying the fluid resin 112 to the embedding recess 111, the bearing member 40 on which the wax 43 is placed may be disposed in the embedding recess 111.

  Next, as shown in FIG. 9B, the wax 43 is washed away using hot water having a temperature equal to or higher than the melting temperature of the wax 43. Thereby, the opening part 34 and the introduction space part 33 are formed, and it will be in the state by which the introduction space part 33 was open | released outside. Also, the pair of curved piece portions 31 are exposed to the outside, and the internal space of the curved piece portion 31 and the gap portion 32 (not shown in FIG. 9B) are open to the outside.

Thereafter, for example, as shown in FIG. 9C, the recess 12 a is formed, the shape of the portion around the opening 34 and the introduction space 33 in the main body 11, and the shape of the curved piece 31 in the main body 11. Adjust the shape of the surrounding area as appropriate. For example, the resin constituting the main body part 11 is partially removed like the resin removing part 114, or the resin constituting the main body part 11 is partially supplemented like the resin supplementing part 113.
Thus, the bearing member 40 can be embedded in the main body 11 and the recess 12 a can be formed in the main body 11.

  Next, the example of the method of producing the metal part 22 of the 2nd denture base 20 is demonstrated.

First, for example, a dummy shaft main body 80 having a structure shown in FIGS. 12A and 12B is prepared.
The dummy shaft portion 81 and the dummy restricting shaft portion 83 of the dummy shaft body 80 are formed in the same shape as the shaft portion 51 and the position deviation restricting portion 53 of the shaft body 50.
The dummy swinging rod part 82 of the dummy shaft main body 80 extends longer from the dummy regulating shaft part 83 than the swinging hook part 52 of the shaft main body 50.
A dummy embedding portion 84 having an anchor function for a pattern resin, which will be described later, for example, is formed around the dummy swinging collar portion 82.
The dummy shaft body 80 is made of a material that disappears by heating and baking, for example, polycarbonate.

Next, the pattern resin is formed so that the portion where the dummy embedding portion 84 is formed in the dummy swinging collar 82 is embedded in the pattern resin (not shown). At this time, if necessary, a portion of the dummy swinging ridge portion 82 opposite to the dummy shaft portion 81 side is cut off, and the metal portion 22 after casting is shaped along the curved shape of the gingiva in the alignment direction of the dentition. To be. This pattern resin is made of a resin material that disappears by heating and baking.
Here, the shape of the structure including the dummy swinging flange 82 and the pattern resin is the shape of the desired metal part 22 (see FIGS. 2 and 3), that is, the shaft body 50, the base part 23, and the second holding. The pattern resin is molded so as to have a shape including the portion 70.

Next, a structure (a structure having the shape of the metal part 22 to be manufactured) that is a combination of the dummy swinging ridge part 82 and the pattern resin is embedded in a sand mold (not shown), and then fired to obtain the structure. A cavity having a shape corresponding to the body is formed in a sand mold.
Next, a molten metal material (for example, a palladium alloy) is poured into the cavity to cast the metal part 22 and take out the metal part 22 from the sand mold.
In this way, the metal part 22 is obtained.
In addition, the metal material which comprises the metal part 22 is not restricted to a palladium alloy.

  Then, the 2nd denture base 20 can be produced by providing the artificial gingiva part 21 in the outer surface side of the metal part 22. FIG.

In addition, compared with the metal part 22 of the 2nd denture base 20 produced by casting, the bearing member 40 which comprises the bearing part 30 can be produced easily. For this reason, the bearing member 40 and the metal part 22 are set so that the bending rigidity of the bearing member 40 (particularly, the bending rigidity of the curved piece part 31) is smaller than the bending rigidity of the metal part 22 (particularly, the bending rigidity of the shaft part 51). Preferably, each material is selected. The bending rigidity here is deformation resistance to a load.
For example, when the bearing member 40 is made of stainless steel and the metal part 22 is made of a palladium alloy, the bending rigidity of the bearing member 40 can be easily made smaller than the bending rigidity of the metal part 22. And the bearing member 40, the bearing member 40 is more likely to be deformed, and the metal portion 22 is less likely to be deformed.

  Further, when the second denture base 20 is attached to or detached from the first denture base 10 or during use of the partial denture 100, the second denture base 20 is moved from the first denture base 10 when the curved piece 31 is deformed. In the removed state, the curved piece portion 31 can be easily repaired using a tool such as a pliers.

According to the first embodiment as described above, the bearing portion 30 of the partial denture 100 is formed between a pair of curved piece portions 31 that are curved in an arc shape and a pair of curved piece portions 31. The gap portion 32, the introduction space portion 33 serving as a movement space of the shaft portion 51 for locking the shaft portion 51 with respect to the pair of curved piece portions 31, and the introduction space portion 33 from the outside of the bearing portion 30. And an opening 34 for insertion into the portion 33, and the opening direction in the radial direction of each of the pair of curved piece portions 31 faces the introduction space portion 33.
And the dimension of the opening part 34 and the introduction space part 33 in the said opening direction is larger than the outer diameter of the axial part 51, and the dimension of the opening part 34 and the introduction space part 33 in the arrangement direction of a pair of curved piece part 31 is the following. The size of the shaft portion 51 in the axial direction of the shaft portion 51 is larger, and the size of the gap portion 32 in the arrangement direction of the pair of curved piece portions 31 is larger than the outer diameter of the swinging flange portion 52.
With such a configuration, the first denture base 10 and the second denture base 20 can be attached and detached more easily, and the bearing portion 30 can be more easily cleaned. Further, the user of the partial denture 100 can perform the attachment / detachment of the first denture base 10 and the second denture base 20 and the cleaning of the bearing portion 30 by themselves.
Moreover, since the shape of the bearing part 30 is simple, when it deform | transforms a little, it can repair easily using tools, such as a pliers.

[Second Embodiment]
Next, a second embodiment will be described with reference to FIGS.
In the case of the present embodiment, the structure of the bearing portion 30 is different from that of the first embodiment, and other structures are configured in the same manner as in the first embodiment.

In the case of the present embodiment, as shown in FIG. 13B, the pair of curved piece portions 31 (the first curved piece portion 31a and the second curved piece portion 31b) in the axial direction of the pair of curved piece portions 31. The width dimensions are different from each other. That is, the width dimension of the 1st curved piece part 31a is larger than the width dimension of the 2nd curved piece part 31b. Further, the gap portion 32 is arranged offset from the center in the width direction of the bearing portion 30.
In order to produce the bearing portion 30 having such a structure, as shown in FIG. 13A, as the plate component 40a, the width dimension of one second plate-like portion 42 (second plate-like portion 42a) is The thing of a structure larger than the width dimension of the other 2nd plate-shaped part 42 (2nd plate-shaped part 42b) is used.
As shown in FIG. 14, one protrusion length (the protrusion length of the first protrusion 51 a) is one curve among the protrusion lengths of the shaft part 51 from the swinging hook part 52 to the bidirectional direction. It has a length corresponding to the width dimension of the one part (the first curved piece part 31a in FIG. 13B), and the other protruding length (the protruding length of the second protruding part 51b) is the other curved piece part. The length corresponds to the length of the second curved piece portion 31b in FIG. 13B.
More specifically, the protrusion length of the first protrusion 51 a from the swinging hook part 52 is set to be equal to the width dimension of the first curved piece part 31 a, and the second protrusion from the swinging hook part 52 is set. The protruding length of the part 51b is set to be equal to the width dimension of the second curved piece part 31b.

  Of the first protrusion 51a and the second protrusion 51b, the first protrusion 51a is locked and pivotally supported by the first curved piece 31a, and the second protrusion 51b is locked by the second curved piece 31b. And the 1st denture base 10 and the 2nd denture base 20 are comprised so that it may be pivotally supported.

  In the case of the present embodiment, as shown in FIG. 14, the positional deviation restricting portion 53 is configured to include a first projecting portion 53 a and a second projecting portion 53 b, and the first projecting portion from the swinging collar portion 52. The protruding length of the first protruding portion 53a is set to be equal to the width dimension of the first curved piece portion 31a, and the protruding length of the second protruding portion 53b from the swinging flange portion 52 is the second bent piece portion. It is set to be equal to the width dimension of 31b.

With such a configuration, when the shaft body 50 is locked and pivotally supported on the bearing portion 30, it is possible to prevent the direction from being reversed, and the second denture base 20 is more reliably connected to the first denture base 10. Can be mounted in the correct orientation.
That is, the first denture base 20 is placed on the first denture so that the first protruding portion 51a is locked to the first curved piece portion 31a and the second protruding portion 51b is locked to the second curved piece portion 31b. By mounting on the floor 10, the second denture base 20 can be mounted on the first denture base 10 in the correct orientation.

[Third Embodiment]
Next, a third embodiment will be described with reference to FIG.
In the case of the present embodiment, the structure of the bearing portion 30 is different from that of the first embodiment, and other structures are configured in the same manner as in the first embodiment.

In the case of the present embodiment, as shown in FIG. 15, at least one curved piece portion 31 of the pair of curved piece portions 31 is opposite to the flat plate portion 35 side in the circumferential direction of the curved piece portion 31. A corner 312 on the side of the gap 32 in the edge 311 is formed in a chamfered shape. In more detail, the corner | angular part 312 is formed in the chamfering shape about both of a pair of curved piece part 31. FIG.
Thereby, the rocking | fluctuation collar part 52 can be inserted in the gap | interval part 32 smoothly.

[Fourth Embodiment]
Next, a fourth embodiment will be described with reference to FIGS. 16 and 17. FIG. 17 shows a cross section in which the swinging collar part 52 is cut along a plane orthogonal to the axial direction of the swinging collar part 52 at an intermediate position between the shaft part 51 of the shaft body 50 and the positional deviation restricting part 53.

  In the case of the present embodiment, the structure of the bearing portion 30 is different from that of the first embodiment, and other structures are configured in the same manner as in the first embodiment.

Also in the present embodiment, the swinging collar 52 is formed in a round bar shape.
In the case of the present embodiment, as shown in FIG. 17, the end edge 35 a on the side of the gap 32 in the flat plate-like portion 35 is formed in an arc shape along the outer peripheral surface of the swinging flange portion 52.
In order to produce the bearing portion 30 having such a structure, as shown in FIG. 16, the plate component 40a has a structure in which the first plate-like portion 41 has an arc-like portion 41a that becomes the edge 35a shown in FIG. Use things.

  According to the present embodiment, as shown in FIG. 17, the outer peripheral surface of the swinging hook part 52 can be brought into close contact with the edge 35 a of the flat plate part 35. It is preferable because it is possible to make it difficult for the food residue to enter the gap between the end edge 35a of 35.

[Fifth Embodiment]
Next, a fifth embodiment will be described with reference to FIG.

In the case of the present embodiment, the structure of the bearing portion 30 is different from that of the first embodiment, and other structures are configured in the same manner as in the first embodiment.
In the present embodiment, the bearing portion 30 (not shown) has a plurality of first anchor pieces 36.
In order to produce the bearing portion 30 having such a structure, as shown in FIG. 18, a plate component 40a having a structure having a plurality of (for example, two) first anchor pieces 36 is used.

  According to the present embodiment, since the bearing portion 30 (not shown) has the plurality of first anchor pieces 36, it can be expected that the anchoring property by the first anchor pieces 36 can be obtained better.

[Sixth Embodiment]
Next, a sixth embodiment will be described with reference to FIGS.

  In the case of the present embodiment, the structure of the bearing portion 30 is different from that of the first embodiment, and other structures are configured in the same manner as in the first embodiment.

In the case of the present embodiment, as shown in FIG. 20, at least one curved piece portion 31 of the pair of curved piece portions 31 is opposite to the flat plate-like portion 35 side in the circumferential direction of the curved piece portion 31. A slit 38 extending in the circumferential direction is formed in the end portion 313, and the end portion 313 is divided into two in the direction of the axis of the curved piece portion 31 through the slit 38.
A portion (first divided piece 39 a) on the gap portion 32 side of the divided end portion 313 is bent toward the axial center side of the curved piece portion 31.
Accordingly, as shown in FIG. 21, the shaft portion 51 can be stably held by the curved piece portion 31 in a state where the shaft portion 51 is locked and pivotally supported by the curved piece portion 31.

A portion (second divided piece 39b) on the side far from the gap portion 32 in the halved end portion 313 is disposed in parallel to the flat plate-like portion 35, for example.
The distance between the first divided piece 39a and the flat plate portion 35, that is, the distance L1 between the tip of the first divided piece 39a and the flat plate portion 35 is shorter than the distance between the second divided piece 39b and the flat plate portion 35. Is set to

The distance L1 between the tip of the first divided piece 39a and the flat plate portion 35 is preferably slightly smaller than the outer diameter of the shaft portion 51.
By doing so, when the shaft 51 is locked and pivotally supported by the curved piece 31, the first divided piece 39a pushed by the shaft 51 is elastically deformed and the first divided piece 39a and After the gap (distance L1) with the flat plate portion 35 is slightly increased, the first divided piece 39a is elastically restored to the state shown in FIG. 21 when the shaft portion 51 is pivotally supported by the curved piece portion 31. The one divided piece 39 a can be brought into close contact with the shaft portion 51.

  However, the present invention is not limited to this example, and the distance L1 may be the same as the outer diameter of the shaft portion 51, or may be slightly larger than the outer diameter of the shaft portion 51. Since the one-segment piece 39a is bent toward the axial center side of the curved piece portion 31, the shaft portion 51 can be more stably held by the curved piece portion 31.

  In the sixth embodiment, the example in which the first divided piece 39a is bent to the axial center side of the curved piece portion 31 among the divided end portions 313 has been described, but the present invention is not limited to this example. The entire end portion 313 may be bent toward the axial center of the curved piece portion 31, and even with such a configuration, the curved piece portion 31 can be bent while the shaft portion 51 is locked and pivotally supported. The shaft portion 51 can be more stably held by the piece portion 31.

  As mentioned above, although each embodiment was described with reference to drawings, these are illustrations of the present invention, and various configurations other than the above can also be adopted.

  For example, in each of the above embodiments, the example in which the bearing portion 30 is provided in the first denture base 10 and the shaft main body 50 is provided in the second denture base 20 has been described, but contrary to these examples, The bearing portion 30 may be provided in the second denture base 20, and the shaft body 50 may be provided in the first denture base 10.

  Further, in each of the above embodiments, the example in which the first holding unit 60 is configured by the pair of wires 61 and the second holding unit 70 is configured by the fixed button 71 has been described. And the second holding unit 70 may be in a holding state, that is, in the second state described above, by being attracted to each other by magnetic force. In this case, one of the first holding unit 60 and the second holding unit 70 is configured with a magnet, and the other is configured with a magnetic material or a magnet.

  Moreover, in order to arrange | position the 1st denture base 10 or the 2nd denture base 20 more stably in an oral cavity, you may provide the clasp. In addition to the annular clasp disposed around the remaining tooth, the clasp may be a one-piece bar clasp used in contact with the inner surface (the lingual surface) of the remaining tooth.

  Further, the above embodiments can be appropriately combined within a range not departing from the gist of the invention.

This embodiment includes the following technical ideas.
(1) A partial denture comprising a first denture base that is detachably attached to an alveolar ridge, and a second denture base that is detachably attached to the first denture base. ,
The bearing side denture base which is one of the first denture base or the second denture base has a bearing portion and a first holding portion provided at a location different from the bearing portion,
The shaft main body side denture base, which is the other of the first denture base and the second denture base, has the first denture base mounted on the shaft main body and the first denture base. A second holding part that is in a state of being held together with the holding part,
The shaft body includes a shaft portion that is pivotally supported by being detachably locked to the bearing portion, and the shaft portion is provided at a tip and extends orthogonally to the shaft portion. And a swinging heel part,
The shaft portion projects in both directions in the axial direction of the shaft portion from the tip of the swinging hook portion,
The bearing portion includes a pair of curved piece portions each curved in an arc shape, a gap portion formed between the pair of curved piece portions, and the shaft portion with respect to the pair of curved piece portions. An introduction space portion serving as a movement space of the shaft portion for locking, and an opening portion for inserting the shaft portion into the introduction space portion from the outside of the bearing portion,
The opening direction in the radial direction of each of the pair of curved piece portions faces the introduction space portion,
The size of the opening and the introduction space in the opening direction is larger than the outer diameter of the shaft portion,
The dimension of the opening and the introduction space in the direction in which the pair of curved pieces are aligned is larger than the dimension of the shaft in the axial direction of the shaft,
A partial denture in which the dimension of the gap in the direction in which the pair of curved pieces are arranged is larger than the outer diameter of the swinging collar.
(2) comprising a bearing member integrally having the pair of curved pieces;
The partial denture according to (1), wherein the bearing member is embedded in an artificial gingiva constituting the bearing-side denture base.
(3) The bearing member includes a flat plate portion parallel to the axis of the pair of curved piece portions,
The partial plate denture according to (2), wherein the flat plate portion is connected in the tangential direction of the edge with respect to the edge in the circumferential direction of each of the pair of curved pieces.
(4) The partial denture according to (3), wherein the flat plate-like portion is rectangular.
(5) The bearing member is configured to include a first anchor piece connected to the flat plate portion,
The first anchor piece is formed in a shape that widens in the protruding direction from the flat plate-like portion, and is embedded in the artificial gingiva that constitutes the bearing-side denture base (3) or (4) The partial denture as described.
(6) The rocking collar is formed in a round bar shape,
The partial denture according to any one of (3) to (5), wherein an edge on the gap portion side of the flat plate portion is formed in an arc shape along the outer peripheral surface of the swinging flange portion. .
(7) For at least one curved piece portion of the pair of curved piece portions, the corner portion on the gap portion side at the edge opposite to the flat plate portion side in the circumferential direction of the curved piece portion, The partial denture according to any one of (3) to (6), which is formed in a chamfered shape.
(8) With respect to at least one of the pair of curved piece portions, a slit extending in the circumferential direction is provided at an end of the curved piece portion opposite to the flat plate portion side in the circumferential direction. Formed, and the end portion is divided into two in the direction of the axial center through the slit, and the portion on the gap portion side of the divided end portion is bent toward the axial center side of the curved piece portion. The partial denture according to any one of (3) to (7).
(9) The bearing member includes a second anchor piece connected to an end portion on the opposite side to the flat plate portion side in the circumferential direction of the curved piece portion,
The partial denture according to any one of (3) to (8), wherein the second anchor piece is embedded in the artificial gingiva constituting the bearing side denture base.
(10) The partial denture as set forth in (9), wherein the second anchor piece is formed in a shape that expands in the direction of protrusion from the curved piece portion.
(11) The width dimensions of the pair of curved pieces in the axial direction of the pair of curved pieces are different from each other,
Of the projecting lengths of the shaft part from the swinging hook part to the bidirectional direction, one projecting length is a length corresponding to the width dimension of one curved piece part, and the other projecting length is The partial denture according to any one of (1) to (10), which has a length corresponding to the length of the other curved piece.
(12) A plate component for a partial denture that constitutes the bearing member of the partial denture according to any one of (3) to (8),
A first plate-shaped portion constituting the flat plate-shaped portion;
A pair of second plate-shaped portions that protrude in parallel with each other from the first plate-shaped portion and are bent to form the curved piece portion;
Board parts equipped with.
(13) The plate component according to (12), wherein each of the pair of second plate-like portions is curved in an arc shape.

10 First Denture Base 11 Body (Artificial Gingiva)
12 outer surface 12a recess 12b wire laying recess 13 artificial tooth 14 inner clamping part 20 second denture base 21 artificial gingival part 22 metal part 23 base part 24 outer clamping part 30 bearing part 31 bending piece part 31a first bending piece part 31b Second curved piece portion 311 Edge 312 Corner portion 313 End portion 32 Gap portion 33 Introducing space portion 34 Opening portion 35 Flat plate portion 35a End edge 36 First anchor piece 37 Second anchor piece 38 Slit 39a First divided piece 39b First Two-segment piece 40 Bearing member 40a Plate component 41 First plate-like portion 41a Arc-like portions 42, 42a, 42b Second plate-like portion 43 Wax 50 Shaft body 51 Shaft portion 51a First projecting portion 51b Second projecting portion 52 Oscillation The flange part 53 The position deviation restricting part 53a The first projecting part 53b The first projecting part 60 The first holding part 61 The wire 70 The second holding part 72 The base part 73 The projecting part 74 The constricted part 80 dummy Body 81 dummy shaft portion 82 dummy swinging rod section 83 dummy restricting shaft portion 84 dummy implanting part 90 mandible 91 alveolar ridge 92 remaining teeth 93 gums 100 partial denture 111 burying the recess 112 fluid state resin 113 resin filling portion 114 resin removal unit

Claims (13)

A partial denture comprising a first denture base detachably mounted on an alveolar ridge and a second denture base used detachably attached to the first denture base,
The bearing side denture base which is one of the first denture base or the second denture base has a bearing portion and a first holding portion provided at a location different from the bearing portion,
The shaft main body side denture base, which is the other of the first denture base and the second denture base, has the first denture base mounted on the shaft main body and the first denture base. A second holding part that is in a state of being held together with the holding part,
The shaft body includes a shaft portion that is pivotally supported by being detachably locked to the bearing portion, and the shaft portion is provided at a tip and extends orthogonally to the shaft portion. And a swinging heel part,
The shaft portion projects in both directions in the axial direction of the shaft portion from the tip of the swinging hook portion,
The bearing portion includes a pair of curved piece portions each curved in an arc shape, a gap portion formed between the pair of curved piece portions, and the shaft portion with respect to the pair of curved piece portions. An introduction space portion serving as a movement space of the shaft portion for locking, and an opening portion for inserting the shaft portion into the introduction space portion from the outside of the bearing portion,
The opening direction in the radial direction of each of the pair of curved piece portions faces the introduction space portion,
The size of the opening and the introduction space in the opening direction is larger than the outer diameter of the shaft portion,
The dimension of the opening and the introduction space in the direction in which the pair of curved pieces are aligned is larger than the dimension of the shaft in the axial direction of the shaft,
A partial denture in which the dimension of the gap in the direction in which the pair of curved pieces are arranged is larger than the outer diameter of the swinging collar. A bearing member integrally including the pair of curved pieces;
The partial denture of Claim 1 with which the said bearing member is embed | buried under the artificial gingiva which comprises the said bearing side denture base. The bearing member includes a flat plate-like portion parallel to the axis of the pair of curved piece portions,
3. The partial denture according to claim 2, wherein the flat plate portion is connected in a tangential direction of the edge with respect to an edge of each of the pair of curved piece portions in a circumferential direction.   The partial denture according to claim 3, wherein the flat plate portion is rectangular. The bearing member is configured to include a first anchor piece connected to the flat plate portion,
The said 1st anchor piece is formed in the shape which spreads as it goes to the protrusion direction from the said flat plate-shaped part, and is embed | buried under the said artificial gingiva which comprises the said bearing side denture base. Partial denture. The swing collar is formed in a round bar shape,
The partial denture according to any one of claims 3 to 5, wherein an edge of the flat plate portion on the gap portion side is formed in an arc shape along an outer peripheral surface of the swinging flange portion.   For at least one of the pair of curved piece portions, the corner portion on the gap portion side at the edge opposite to the flat plate portion side in the circumferential direction of the curved piece portion has a chamfered shape. The partial denture according to any one of claims 3 to 6, which is formed.   A slit extending in the circumferential direction is formed at an end portion of the curved piece portion opposite to the flat plate portion side in at least one of the pair of curved piece portions. The end portion is bisected in the direction of the axial center through the slit, and a portion on the gap portion side of the bisected end portion is bent toward the axial center side of the curved piece portion. Item 8. The partial denture according to any one of Items 3 to 7. The bearing member is configured to include a second anchor piece connected to an end portion on the opposite side to the flat plate portion side in the circumferential direction of the curved piece portion,
The partial denture according to any one of claims 3 to 8, wherein the second anchor piece is embedded in the artificial gingiva constituting the bearing side denture base.   The partial denture according to claim 9, wherein the second anchor piece is formed in a shape that expands toward a protruding direction from the curved piece portion. The width dimensions of the pair of curved pieces in the direction of the axis of the pair of curved pieces are different from each other;
Of the projecting lengths of the shaft part from the swinging hook part to the bidirectional direction, one projecting length is a length corresponding to the width dimension of one curved piece part, and the other projecting length is The partial denture according to any one of claims 1 to 10, wherein the denture has a length corresponding to the length of the other curved piece. A plate component for a partial denture constituting the bearing member of the partial denture according to any one of claims 3 to 8,
A first plate-shaped portion constituting the flat plate-shaped portion;
A pair of second plate-shaped portions that protrude in parallel with each other from the first plate-shaped portion and are bent to form the curved piece portion;
Board parts equipped with.   The plate component according to claim 12, wherein each of the pair of second plate-like portions is curved in an arc shape.

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