JP2554037B2 - Local denture holding device and holding device for the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detachably holding a local denture on a natural tooth side and a holder used in the device.

[0002]

2. Description of the Related Art It is known to use a pin-shaped member as a detachable holding device for a local denture, for example, Japanese Patent Publication No. 57-33054 is spring-biased to stop an attachment to a connecting body. The use of pins is disclosed. However, in this case, in order to attach the attachment to the abutment tooth, a treatment such as providing a protrusion on the abutment tooth is required. Further, in the case of JP-A-62-68453, female parts are formed on the left and right of the denture in order to place the denture between the left and right dentures (natural teeth), and the male part to be mated with it is formed on the left and right dentures. Since it is planted on the side surface, it is necessary to cut the dentition (abutment) in this case as well.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its object is to provide a local denture without cutting adjacent teeth (abutment teeth) which are natural teeth. Is to be able to hold it accurately.

Another object of the present invention is to make it possible to reliably hold a local denture with this device alone.

[0005]

To solve the above problems, the present invention is a device for detachably holding a local denture on a natural tooth side, in which a denture 11 for replenishing a missing tooth is replaced by a local denture body 10. A holder 20 having an engaging member 21 that is rotatably hinged by a support shaft 12 and is spring-biased toward the distal end is embedded in the distal end portion of the rotating artificial tooth 11 so that only the engaging member 21 projects. The means for engaging the engaging element 21 and forming the engaging opening 13 for holding and fixing the denture 11 in the local denture main body 10 is taken.

[0006] The above-mentioned engagement element is a hollow outer cylinder 24 which is fitted into a mounting portion formed on a denture, an engagement element 21 which is incorporated in the outer cylinder so as to be able to move forward and backward, and the engagement element 21 of the outer tube 24. A spring 22 that is interposed between the outer cylinder 24 and the other end of the outer cylinder 24 for pressing in the distal direction, and an adjuster that is provided at the other end of the outer cylinder 24 to support the spring 22 so as to be able to move forward and backward by screwing into the outer cylinder 24. It is desirable to use the one composed of 23 and.

[0007]

1 and 2 relate to a local denture implementing a holding device according to the present invention, and this local denture is to be attached to a natural tooth, but for the sake of convenience, FIG. 1 and FIG. It is shown. Therefore, the tooth row represented by the two-dot chain line of the model 30 corresponds to a natural tooth, and the local denture main body 10 is detachably attached to the tooth row as an abutment tooth.

The illustrated local denture main body 10 has dentures 11 and 11 'for compensating for defects of the sixth and seventh teeth on the left side. The denture base 14 extending along the lingual side and the third, fourth and fifth teeth on the left side. And an undercut portion of the right third and fourth teeth and an engagement arm 15 formed so as to be entangled between the teeth. Of the two dentures, the inner denture 11 'is implanted in the denture base 14',
The denture 11 between is hinged to the denture base 14 by the support shaft 12, and when the denture 11 is housed in place by the holding device according to the present invention, the entire local denture body 10 engages the natural tooth and its undercut, The required maintenance power can be obtained.

A denture base 14 'having an inner denture 11' implanted therein is formed in a substantially U-shaped cross section so as to extend over the lingual side and the outside (FIGS. 3 (a) and 3 (b)). 14 "is provided integrally with the denture 11 of the device of the present invention. A portion 16 where the denture 11 is hinged is projected to the outside (Fig. 4), and is located at the lowermost part of the tooth base, and the denture 11 is placed from the outside. The protrusion 17 is provided on the lower surface of the denture 11 toward the floor, and the outer floor 14 ″ is provided.
Since it fits with the recess 18 on the upper surface of the hinge, it is possible to avoid applying unnecessary occlusal pressure to the hinge.

With respect to such a local denture, the present invention has a holding body 20 having an engaging element 21 which is spring-biased toward the distal end.
Is embedded in the distal end portion of the rotating denture 11 so that only the engaging element 21 projects and is engaged with the engaging element 21.
An engaging opening 13 for holding and fixing 1 in a fixed position is provided in a tongue type of a denture base 14 of the local denture main body 10 (see FIGS. 3 and 4).

The holder 20 is embedded in the side surface of the denture 11 on the lingual side, with the tip of the engaging element 21 protruding therefrom, and the rising portion 19 that can contact the side surface of the denture has a denture base 14.
It is provided so as to stand up from the
An engagement port 13 is formed on the shaft 9. The rising portion 19 protrudes in an arc shape from the left and right to form an engagement port 13 so as to hold the engaging element 21 that rotates from the outside from both sides. This engaging port frame has a ridge 2 at the tip of the engaging element 21 at the center.
It has a notch 28 for passing 8 '. Therefore, the engaging port 13 may be closed when the ridge 28 'is not provided. The thickness of the rising portion 19 determines the mechanical fixing force with the engaging element 21, which is substantially equal to the protruding amount of the engaging element 21 and also the depth of the recess 29 on the lingual side surface of the artificial tooth 11. Is set. Therefore, neither the engaging element 21 nor the rising portion 19 almost protrudes to the tongue side, and no discomfort is given.

The local denture held by the holding device of the present invention thus constructed has the denture 11 rotated outward as shown by the chain line in FIG. 3A or the solid line in FIG. If it is confirmed that the whole body does not move by fitting the denture 11 to the lingual side, the holder 20
The engaging element 21 at the tip of is engaged with the engaging opening 13. At this time, since the denture bases 14 'and 14 "provided with the dentures 11 and 11' are fixed by the engagement of the holding device across the U-shape on both sides of the dentition defect, the local denture body 10 is undercut. Since the engaging piece 21 is provided with the linear ridge 28 ', it can be maintained stably.
8 to guide the engaging element 21 to the fixed position.

The holding body 20 includes a hollow outer cylinder 24 fitted in a mounting portion formed on a denture, an engaging member 21 which is installed inside the hollow outer cylinder 24 so as to be capable of advancing and retracting, and the engaging member 21 in a front end direction of the outer cylinder 24. A spring 22 interposed between the outer cylinder 24 and the other end of the outer cylinder 24 for pushing the outer cylinder 24, and an adjuster 23 provided at the other end of the outer cylinder 24 supporting the spring 22 so as to be able to move forward and backward by screwing into the outer cylinder 24. Composed.

An example thereof is shown in FIGS. 5 to 7, in which the holding body 20 in the holding device of the above-described embodiment has an elongated groove 25 formed in the engaging element 21 in the advancing and retreating direction, and a spherical shape capable of rolling there. A concave groove 27 for holding the trochanter 26 is provided on the inner surface of the outer cylinder 24 to prevent straight movement and retaining. It is not necessary to forcibly provide the ridge 28 'at the tip, but when it is provided, it may be a protrusion as well as a recess, and those irregularities may form the concave and convex portions.
It may be provided on the other side. An example is shown in FIG. FIG. 7 shows a case where the engaging element 21 has a flat plate shape, which is used in a case where the height of the teeth from the mucous membrane is not so large. In this case as well, the convex ridge 28 'is not provided to improve the tongue feeling. There is.

In the example of each drawing (b), the position of the spring 22 that pushes the engaging projection 21 is made to be able to advance and retreat, and the spring 22 pushes the protrusion 32 incorporated in the male screw-shaped screw cylinder 31,
The screw cylinder 31 is screwed into the female screw portion 33 at the rear end of the outer cylinder 24, and the position can be adjusted by turning the adjustment 23 provided at the rear end of the screw cylinder. The example of each drawing (c) simplifies (b) and directly pushes the engaging element 21 by the spring 22, and other configurations may be the same as the above-described examples of FIGS. Instead of the explanation.

Since the holder 20 having such a structure is an assembly incorporated in the outer cylinder, it is easy to handle, and it is attached / detached to / from the holes 34 formed as attachment portions in the dentures 11 and 11 'with fingertips. It is possible to use it even if both sides or one side of the dentition is missing. In addition, it is not necessary to cut natural adjacent teeth (abutment teeth) for attaching the holder 20 and forming the engagement opening 13.

[0017]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, it can be used without brazing on a casting floor or the like, and the health of the adjacent tooth is not impaired, or the condition of the adjacent tooth is not affected. It is possible to perform the operation regardless of the above, and it is possible to accurately hold the attached local denture.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a holding device for a local denture according to the present invention.

FIG. 2 is a perspective view of the device of the same as seen from the opposite side.

3A is a sectional view taken along line AA of FIG. (B) BB sectional drawing of FIG.

FIG. 4 is an enlarged perspective view showing a main part of the apparatus.

FIG. 5A is a front view showing a first example of a holding body. (B) A longitudinal sectional view of the first example. (C) Sectional drawing of the modification of a 1st example.

FIG. 6 (a) is a front view showing a second example of the holding body. (B) A longitudinal sectional view of the second example. (C) Sectional drawing of the modification of a 2nd example.

FIG. 7A is a front view showing a third example of the holding body. (B) A longitudinal sectional view of the third example. (C) Sectional drawing of the modification of a 3rd example.

Claims (5)

(57) [Claims] 1. A device for detachably holding a local denture on a natural tooth side, wherein a denture 11 for replenishing a missing tooth is rotatably hinged to a local denture main body 10 by a support shaft 12, and the distal end is provided. The holding body 20 having the engaging element 21 that is biased in the spring direction is attached to the tip of the rotating denture 11 by the engaging element 21.
A device for holding a local denture, characterized in that only the local denture main body 10 is formed with an engaging opening 13 for holding and fixing the denture 11 by projecting and embedding the denture 11. 2. A device for detachably holding a local denture on a natural tooth side, comprising a local denture main body 10 for obtaining a maintenance force by utilizing an undercut existing in the natural tooth,
The denture 11 for replenishing the missing tooth is hinged to the outside of the local denture body 10 by a support shaft 12 so as to be rotatable, and the holding body 20 having an engaging element 21 spring-biased toward the tip is rotated. Only the engaging element 21 is protruded and embedded in the distal end portion of the, and an engaging port 13 for engaging the engaging element 21 and holding and fixing the denture 11 is formed on the lingual side of the local denture main body 10. A device for holding a local denture. 3. The adjuster 2 is biased by a spring 22 in a direction in which the engaging element 21 projects by a dimension substantially corresponding to the thickness of the engaging opening 13 and is screwed into the other end of the engaging element 21.
The local denture retainer according to claim 1 or 2, wherein the spring 22 is pressed by means of 3. 4. A hollow outer cylinder 24 fitted into a mounting portion formed on a denture, an engaging member 21 that is installed inside the outer cylinder so as to be able to move forward and backward, and the engaging member 21 is pressed toward the tip of the outer cylinder 24. Therefore, the spring 22 interposed between the outer cylinder 24 and the other end thereof, and the outer cylinder 2 at the other end of the outer cylinder 24 for supporting the spring 22.
Adjuster 23 provided so as to be able to move forward and backward with respect to 4
A holder for a device for holding a local denture, which comprises: 5. A long groove 25, which is formed in the engaging member 21 or the outer cylinder 24 in the forward and backward directions, and a long groove 25 formed in the forward and backward direction, and either of the outer cylinder 24 or the engaging member 21 for holding the rotator 26. The holding body for a local denture holding device according to claim 4, further comprising a concave groove 27 formed in the.