JPS6016253B2 - implant denture - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dental implant, and particularly to an implant denture with an improved upper transverse structure.

In order to restore fallen or extracted teeth with dentures, an intraosseous implant or an endodontic intraosseous implant (hereinafter simply referred to as an intraosseous implant) is inserted into the jawbone and used as a tooth line, and the superstructure is then crowned. Attempts to restore function using so-called isoprant dentures are becoming more popular.

Along with this, many proposals have been made regarding the material, shape, etc. of implant dentures, especially the intraosseous implants used therein. Intraosseous implants are now being improved to have mechanical strength that can withstand high cough pressures. However, the individualization of such endosseous implants into the jawbone has led to other clinical problems. With natural teeth, the pressure and impact of the cough suppression is alleviated by the cushioning effect of the periodontal ligament, whereas with implant dentures, the pressure and impact applied to the upper structure directly reaches the jawbone, causing bone damage. It induces tissue sagging, bone dissolution, and resorption near the interface between the internal implant and the jawbone tissue. For this reason, in general, in implant dentures, the contact surface is made smaller and smoother to the extent that the pressure and impact on the tooth roots does not increase, or the contact force is reduced by other means, so that the contact force is reduced. The superstructure had to be sacrificed to the main body, and the superstructure could not be said to be in a satisfactory condition. Furthermore, if the load on the denture is reduced by fixing it to a healthy adjacent tooth, this is undesirable as it will damage the healthy tooth. An object of the present invention is to provide an implant denture with anti-reflection performance close to that of natural teeth.

Another object of the present invention is to provide an implant prosthesis that does not cause undesirable abnormalities near the interface between the intraosseous implant and the jawbone. Another object of the invention is to
To provide an implant denture that has elasticity corresponding to the cough resultant force at the treatment site and can be selected as the one most suitable for the site. Yet another object of the present invention is to provide an implant denture that allows the state of the denture to be adjusted and adapted in accordance with changes in tissue at the surgical site after intraosseous implant surgery or changes in surrounding tissue after long-term use. It is to be.
Another object of the present invention is to provide an implant denture that can independently function satisfactorily without damaging adjacent teeth. The implant denture of the present invention is mounted via the elastic body and the holder without the tooth crown being fixed to the intraosseous implant head. As this elastic body is made of a material with an elastic modulus that is suitable for the cough resultant force that is to be applied to the treated tooth, the resultant force is dissipated, weakening the impact on the implant root, and protecting the implant and jaw bone tissue. Found. In addition, by attaching the receiver, elastic body, and tooth crown to the intraosseous implant head with a removable structure, it is possible to replace the elastic body immediately after the implant treatment and after the bone wound has healed. It has also been found that it is possible to provide an upper structure with a wide range of different elasticities that can accommodate individual differences. In the implant denture of the present invention, in particular, by attaching the receiver to the head of the intraosseous implant, the action and effect of the elastic body crowned thereon can be further increased, and a larger elastic body can be obtained by using fewer elastic bodies. It was found that it has the effect of

That is, the present invention consists of an intraosseous implant, a bracket attached to the head of the implant, an elastic body attached to the bracket, and a tooth crown attached to the elastic body, and the bracket is integrated with this. The present invention provides an imbrandt denture characterized in that the flange is crowned with the elastic body.

The present invention will be specifically explained with reference to the drawings showing an example of an implant denture.

FIG. 1 is a longitudinal sectional view of the implant denture of the present invention,
FIG. 2 is an enlarged view of the upper structure of the implant denture in FIG. 1. FIG. In Fig. 1, 1 is an intraosseous implant, 2 is a tooth crown, 3, 3a and 3b are elastic bodies, 4 is a screw pin, 5 is a receiver, 5a is the collar of the receiver, 6 is a tooth ant, and 7 is a It is the jawbone. In FIG. 1, an intraosseous implant 1 is implanted in a jawbone 7, and a support 5 is attached to the head thereof. To attach the support 5 to the head of the intraosseous implant 1, it can be firmly attached, for example, or fixed with screws or cement. The receiver 5 has a flange 5a that is integral with the receiver 5, and the flange 5a has a soft elastic body 3a and a hard elastic body 3.
It is crowned by b. The elastic body 3a is attached to a portion of the receiving shell 5 that is attached to the head of the intraosseous implant, and a hard elastic body 3b is attached to the hard elastic body 3a. To attach the hard elastic body 3a to the support 5, an elastic adhesive,
It may be fixed by a projection or the like on the surface of the receiver 5 for maintenance. In this way, the European elastic body is
and is surrounded and isolated by a hard elastic body 3b.
The hard elastic body 3b can be firmly attached to the soft elastic body 3a. To attach the tooth crown 2 to the hard elastic body 3b, it can be firmly attached with iron or fixed with an adhesive or the like. For example, from the inside of the tooth row to the center of the denture,
A screw hole is bored through the crown and the hard elastic body 3b, and a fly pin is used to fix the crown 2 and the hard elastic body 3b to each other to prevent them from falling off. The intraosseous implant in the present invention is
Ceramics, metals, resin carbides, or composites thereof, such as ceramics baked onto the surface of a metal implanted part, can be freely selected from various shapes that have already been proposed.

The dental crown in the present invention can be made of materials conventionally used as dental materials, such as ceramics, synthetic resins, metals alone or alloys.

The elastic body in the present invention has a thickness necessary to support the tooth crown, absorb and relieve pressure or impact applied to the tooth crown, and also holds the tooth crown without causing significant deformation during coughing. In addition, it must have an appropriate modulus of elasticity commensurate with the combined force of coughing so as to absorb and alleviate combined pressure or impact.

That is, the elastic body has a normal barrier pressure of about 20 to 70 k9/c
It is necessary to use a material that will shrink appropriately when subjected to pressure exceeding that of the tiger. For example, immediately after the treatment, in order to limit the force applied to the root of the implant to a very small extent, an implant with a large elastic modulus that contracts by about 0.5 to 1 skin at the time of separation is used. A sponge material having a certain degree of hardness may be used temporarily. After the bone wound has healed,
It is preferable to use an elastic body that contracts by about 0.1 to 0.2 ribs due to the natural combined force of coughing. In other words, an elastic body has an elastic modulus that contracts appropriately depending on the pressure applied to it. About 1/
Those that cause a volumetric contraction of up to 50% are used. Such elastic materials include polymeric materials with excellent properties such as non-water absorption, impact resistance, aging resistance, abrasion resistance, non-altering properties, corrosion resistance, and safety, such as silicone resin, nylon, fluororesin, and vinyl resin. , polyacrylic acid ester resin, polyolefin resin, polyurethane resin, etc. can be appropriately selected and used. In particular, for the soft elastic body separated by the receiver and the hard elastic body, a wider range of elastic materials can be appropriately selected and used. The elastic body may be homogeneous, but it is preferable to have a multilayer structure of a plurality of elastic materials with different elastic moduli, for example, an elastic body on the implant side and a hard elastic body on the coronal side, or an elastic body on the inner side. It may be made such that the elastic modulus changes continuously from the center outward.

Usually, it is preferable to use a soft elastic body attached to the support and a hard elastic body attached to the soft elastic body, and the amount of soft elastic body used in this case is compared to the case without the support. It can be done less.

The receiver of the present invention effectively works the shock absorption function of the elastic body and removes the pressure by receiving the elastic body when the pressure of obstruction or coughing is applied to the elastic body attached to it. It has the effect of increasing the recovery property when it is damaged, and a rigid material such as stainless steel can be used. That is, according to the present invention,
Since the crown of the implant denture of the present invention is attached to the receiver and eventually to the head of the intraosseous implant via an elastic body, cough pressure and inhibition are improved.

The impact caused by the shield is absorbed and softened by the elastic body. By attaching a receiver having a flange that can be attached to an elastic body to the head of an intraosseous implant and isolating the elastic body in particular, compared to the case where such a receiver is not used, By using a smaller amount of European elastic material, it is possible to more effectively absorb and alleviate the cough combination pressure and obstructive impact, and improve the resilience when the cough combined pressure and obstructive impact are removed. It is possible,
This has the effect of enabling long-term use of the elastic body. According to the present invention, a soft elastic body with a larger elastic modulus is attached to the receiver as the elastic body, and a hard elastic body with a smaller elastic modulus is attached to the soft elastic body, so that the soft elastic body is attached to the receiver. By separating them with a hard elastic body, it is possible to appropriately select and use a wider range of elastic materials as the soft elastic body.

Here, the sensitive elastic body may be isolated by the surface of the intraosseous implant head and the hard elastic body without using a support, but it is important to improve the shock absorption function and restorability of the elastic body, and to keep the elastic body long-term. It cannot be said that it is sufficient in terms of use. According to the present invention, furthermore, when a solid elastic body and a hard elastic body are used as the elastic body for an implant denture, and the elastic body is isolated by a support and a hard elastic body, the elastic body is separated from the support. When attaching a crown to the body, various types of protrusions for maintenance, fixation with elastic adhesives, etc. can be prepared and used for healing.

According to the present invention, the intraosseous implant head, the receiver, the elastic body, and the tooth crown can be made removable.
These replacements, prosthetics, etc. are easy.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the implant denture of the present invention, and FIG. 2 is an enlarged view of the upper structure of the implant denture in FIG. 1. (Explanation of symbols), 1...Intraosseous implant, 2
...Tooth crown, 3, 3a, 3b...Elastic body, 4...Threaded pin, 5...Receptacle, 5a
....Brim of receiver, 6.. Tooth imitation, 7.. Jaw bone. Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1. Consists of an intraosseous implant, a holder attached to the head of the implant, an elastic body attached to the holder, and a tooth crown attached to the elastic body; An implant denture characterized in that it has a flange that forms a body, and the flange is crowned on the elastic body. 2. The implant denture according to claim 1, wherein the elastic body has a multilayer structure of a plurality of elastic materials having different moduli of elasticity. 3. The implant denture according to claim 2, wherein the elastic body comprises two layers of a soft elastic body and a hard elastic body. 4. The implant denture according to claim 3, wherein the collar of the receiver is crowned on all of the soft elastic body and at least a part of the hard elastic body. 5. The implant denture according to claim 1, wherein the intraosseous implant head, the receiver, the elastic body, and the tooth crown are removably attached. 6. The implant denture according to claim 1, wherein the elastic body is fixed to the holder with a projection or an elastic adhesive for maintenance when the elastic body is mounted on the holder. 7. The implant denture according to claim 5 or 6, wherein the tooth crown is fixed to the elastic body with a threaded pin.