JPH11113928A - Denture retainer in oral cavity - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a denture which has a favorable appearance, and is excellent in maintainability-stability without grinding a healthy tooth by a method wherein for this device which retains a denture in an oral cavity, a retaining part is made openable by an operation device, and at the same time, it is constituted in such a manner that a denture can be attached/detached under a state wherein the device is opened. SOLUTION: Retaining parts A and A' are formed in such a manner that after a wax pattern is manufactured on a plaster prototype while adjusting to a retaining tooth and gum of an individual patient, the pattern is replaced with a metal by casting, and the parts A, A' are rockably supported to a cover case E by a rotating shaft C respectively. Then, by turning an operation device F which is bridged between plate-form bodies B, B integrated with respective retaining parts A and A', the retaining parts A and A' are opened/closed with the rotating shafts C, C as the centers, and when it is operated to be closed, the retaining tooth and gum are gripped between the retaining parts A and A'. Under this gripped state, the fitting of a denture is performed. By this method, a denture which is excellent in appearance and retention can be provided without specially grinding a healthy tooth.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for maintaining a denture.

[0002]

2. Description of the Related Art Conventionally, as a device for maintaining and stabilizing a denture in an oral cavity, there is a device for maintaining a hook or a telescope system.

[0003] In dentures using hooks, the upper arm of the hooks prevents rolling and sinking by utilizing the elasticity of the metal, and the lower arm resists detachment of the dentures and has a retaining force.

[0004] In the telescope system, the denture has been maintained by a structure in which teeth are cut into a cast crown, a concave groove is provided, and a convex shape that fits the groove is slid.

[0005]

However, the conventional device for maintaining a hook uses a frictional resistance with a tooth surface or the elasticity of a metal to obtain a retaining force, but this is insufficient.

[0006] The hook is maintained by using a part of the undercut portion of the maintenance tooth. However, a force for pulling out the maintenance tooth at the time of attachment and detachment is applied, and a load is applied to the periodontal tissue.

[0007] When the attachment and detachment of the denture is repeated, the elasticity of the hook weakens, the stability of the denture becomes poor, and the maintenance tooth is shaken.

If the lower arm is set to an undercut portion more than necessary, the maintenance force increases and the denture becomes stable, but the resistance to the maintenance tooth is too large and the denture cannot be attached or detached.

Further, when the hook arm is long and located on the buccal flank of the anterior teeth and premolars, the appearance is impaired and the aesthetics are impaired.

[0010] In the maintenance device of the telescope system, the frictional resistance between the concave surface and the convex surface made of metal acts as a maintenance force, so that, over a long period of time, the metal wall is worn and the maintenance force is weakened, causing damage.

[0011] Further, in the manufacture of the maintenance device of the telescope system, sophisticated and expensive equipment is required due to its complexity and precision. This is expensive for the patient.

[0012] Even if the maintenance teeth are sound, they must be shaved to form a cast crown, which rather destroys the natural state.

[0013]

SUMMARY OF THE INVENTION According to the present invention, in order to provide a denture with good esthetics and excellent maintenance stability without cutting healthy teeth, the maintenance parts A and A 'are operated by the operating device F. This is a maintenance device that can be opened and closed, and a denture can be attached and detached in an open state. In this device, as shown in FIG. 2, when the operating device F is turned, the body G is pushed in the direction of the arrow H by the projection G, and the holding portions A and A 'are opened about the rotation axis C. When the operating device F is returned, as shown in FIG. 3, the body B is pushed and spread in the direction of arrow I by the spring, and the holding portions A and A '.
Close and grasp the retaining teeth and gums. The stopper J is fixed so that the body B is not closed, and is not opened when the holding portions A and A 'are gripping the holding teeth and gingiva.

[0014]

The opening of the retaining portions A and A 'allows sufficient loosening of the retaining teeth and gingiva. Even if the retaining portions A and A' are in the undercut portion, the frictional resistance cannot be applied to the retaining teeth and gingiva. Can be attached and detached without giving In addition, the maintenance teeth can be grasped by using the undercut portion more widely than before, so that the stability of the denture is improved.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

[0016] The maintenance parts A and A 'are prepared by forming a wax pattern on a plaster model according to the maintenance teeth and gums of each patient.
Otherwise, it is made of synthetic resin, castable material, or wax, and the cheek side maintaining portion A is connected to the cheek side rotation axis C,
The tongue-side retaining portion A 'is connected to the tongue-side rotation axis C, and is cast in one piece and replaced with metal.

FIG. 4 shows a state in which the maintenance parts A and A 'are of the type for grasping the gingiva and the parts are combined.

The cover case D is placed over the cover case to complete the artificial tooth and the denture embedded in the floor.

FIG. 5 is a side view of the tongue with the completed denture mounted in the oral cavity.

When the retaining portions A and A 'are set to gingiva, they are covered with a gum-colored resin, and in order to further prevent pain,
It is advisable to protect the part in contact with the gum with a soft lining material.

FIG. 6 shows a state in which the holding part is fitted with a denture holding the gingiva and smiles. It is difficult to touch the appearance because the maintenance part is hidden on the cheek.

When a denture is to be worn, the operating device F is turned with a finger, and the maintenance parts A and A 'are opened so as to enter the oral cavity. When the operating device F is returned, the maintenance portions A and A 'are closed and mounted.

Similarly, when removing the denture, the operating device F
Is turned to open the maintenance portions A and A 'and remove them from the oral cavity.

[0024]

The maintenance device of the present invention can provide a denture with excellent aesthetics and stability without bothersomely cutting healthy teeth.

In the place where there is an undercut, the maintenance part A,
Even if the setting of A 'is made, there is no problem in attaching and detaching the denture by opening the maintenance portion.

The retaining portions A and A 'can have a large area to be gripped by the undercut portions of the retaining teeth, so that the retaining force can be secured. In addition, it is possible to make it difficult to touch the appearance by positioning it on the gingiva, and it is possible to make it difficult to recognize when the denture is put on during conversation.

Further, since the retaining portions A and A 'can be opened and loosened, and the denture can be attached and detached without applying a pulling force to the retaining teeth, the burden on the periodontal tissue is small.

Further, it can be easily attached and detached without giving a pain to the patient.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a maintenance device of the present invention.

FIG. 2 is a view showing a state in which holding parts A and A ′ are opened with respect to the holding teeth.

FIG. 3 is a diagram showing a state in which the maintenance parts A and A ′ are closed with respect to the maintenance teeth.

FIG. 4 is a perspective view of the maintenance device before covering the upper case D with the cover case.

FIG. 5 is a view from the lingual side of a denture mounted in the oral cavity.

FIG. 6 shows a denture worn in the oral cavity.

[Explanation of symbols]

 A Buccal side maintenance part A 'Lingual side maintenance part B Body C Rotating axis D Upper cover case E Lower cover case F Operating device G Projection H Arrow direction I Arrow direction J Stopper

Claims (1)

[Claims] 1. A maintenance device characterized in that a maintenance part can be opened and closed and grips maintenance teeth and gums.