JPS639451A - Implant denture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of Application Kikomei relates to implant dentures using artificial tooth roots.

BACKGROUND OF THE INVENTION Artificial tooth roots and implant dentures have a long history, and a variety of studies have been conducted to date.

Conventionally used artificial tooth roots are made of metals (titanium, Go-Or gold alloy, alumina ceramic, zirconia ceramic, etc.), and their shapes are divided into screw types, hollow types, blade types, etc. , each with its own characteristics.

Currently, when these artificial tooth roots are implanted in the jawbone or mucous membrane, in order for the artificial tooth root to be stable for a long time and maintain its implantation within the bone and flesh without movement, it is necessary to It is considered a necessary condition to achieve immobilization by closely adhering the bone to the bone. On the other hand, regarding the dental crown which is the upper part of the body,
Conventionally, a tooth crown made of chiang metal is fixed by directly adhering it to the exposed neck of an artificial tooth root, and is also fixedly connected to the remaining natural tooth via a bridge. This ensures that the entire implant denture is firmly fixed within the bone. Therefore, the occlusal force applied to the implant denture acts directly on the interface between the human face and the new maternal surface.

Problems to be Solved by the Invention Natural teeth are suspended and fixed within the periodontal ligament, which is mainly composed of bonded silk-like fiber bundles. The large biting force necessary to crush food is obtained without destroying the food, causing any movement or sinking.

By the way, as mentioned above, conventional implant dentures are strongly fixed in the jawbone via the artificial tooth root, so the load during occlusion is entirely distributed between the mucous membrane, jawbone, and the surface of the artificial tooth root, without any M impact. It will be accepted at the interface. Therefore, during occlusion, there is a small width in the stress distribution at the interface,
This destroys the adhesive structure at the interface, causing the artificial [fl root to sway and fall off. Furthermore, since conventional implant dentures do not have a cushioning effect, when excessive occlusal pressure is applied, the stress can destroy the interface between the artificial tooth root and the new matrix, even causing temporomandibular joint abnormalities. .

Furthermore, when connecting the bridge to the remaining natural tooth, secondary problems such as scraping of the normal natural tooth may occur. Moreover, with IJ3 in the connected state, the natural tooth size is approximately 150.
Although the IJ buffering effect occurs, the IJ effect does not occur in the implant denture area, resulting in an unbalanced occlusal stress distribution throughout the implant denture, which causes the artificial tooth root to move and fall out.

The ideal implant denture is the individual implantation of an artificial tooth root.
Moreover, it is loose like natural teeth! It has an i function.

The object of the present invention is to have a buffering capacity of 1rI.
To provide an implant denture that enables independent implantation, can easily be repaired against wear, etc. by replacing only a part, and can be applied to all artificial tooth roots currently on the market.

Means for Solving the Problems In order to solve the above problems, the implant denture of the present invention includes an artificial tooth root that is implanted in the jawbone and mucous membrane, an artificial tooth root that is fixed to the exposed neck of the artificial tooth root, and an artificial tooth that is attached to the central part of the implant denture. A lower tooth crown made of metal and having a screw hole that opens the end surface of the tooth root, a screw body that is loosely screwed into the screw hole and has an upper tooth crown made of resin fixed thereto, and this screw body and the upper surface of the lower tooth crown. and a second buffer material interposed between the inner end of the threaded body and the end surface of the artificial tooth root.

According to the present invention having such a structure, the occlusal force is first buffered by the lower tooth crown made of wood, then by the first cushioning material, and the screw body receives a buffering effect corresponding to the play of the loose screw. C) will receive a buffering effect by sinking and covering.

In addition, to prevent wear of the occlusal surface and deterioration of the AT material, the screw body is unscrewed after the +A fat occlusal surface of the lower crown is destroyed, and the screw body with the new upper crown fixed is screwed in. This allows for easy replacement.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 to 3.

1 is an artificial tooth root consisting of a screw portion 1A and an exposed neck portion 1B;
It is implanted into the jawbone/mucosal membrane 2 via the threaded portion 1A. This artificial tooth root 1 is made of metal (titanium, Go-Cr alloy)
, alumina ceramic, zirconia ceramic, etc., and the shape is not limited to the screw type shown by the threaded portion 1A, but may also be a medium-outside type, a blade shape, a tooth root type, etc. . A lower crown 3 made of cast metal is fixed to the exposed portion 1B of the artificial tooth root 1. This lower crown 3 has a through hole 4 in its central portion, and the outer half of this through hole 4 is formed as a screw hole 5. Further, the outer surface has a plate-like inclined receiver formed on the surface 6.

The lower crown 3 is then externally fitted onto the exposed neck 1B through the through hole 4, and at this time, a strong adhesive 7 such as resin is interposed between the two to firmly adhere and fix. At this time, the end surface 1b of the exposed neck portion 1B is open into the screw hole 5.

Reference numeral 8 denotes a screw-like screw body, which consists of a screw portion 8A that can be screwed into the screw hole 5 and a four-shaped head 8B.

The bottom surface of the head 8B is formed with a contact surface 9 that is in contact with the receiver 6 via a first bullet material 15 made of, for example, a rubber material, and the flat top surface has a ten-shaped operation panel. 4 parts 1
0 and a recess 11 for locking with the lower tooth crown is formed. 1
The threaded portion 8A is screwed into the threaded hole 5 labeled 1L loosely so that a play 12 of, for example, 150μ width is generated between both screws. Prior to loosely screwing together the screw body 8,
Inside the screw hole 5 is a second disk-shaped plate made of rubber material, for example.
The cushioning material 13 is inserted, so the second cushioning material 13 is
It is interposed between the end surface 1b of the exposed portion 1B and the inner end 8a of the threaded portion 8Δ. The thickness of both AT materials 13.15 is
Preferably, the play is 150μ, which is the same as the play 12 described above. The head 8
An upper tooth crown 14 molded from resin is fixed to B.

According to the above-described embodiment, the occlusal force is first subjected to a different action by the lower tooth crown 14 made of resin, and then is transmitted to the head 8B. Of the biting force transmitted to the head 8B, the peripheral portion is due to the first cushioning material 15 between the contact surface 9 and the receiving surface 6! ! It is received by the lower crown 3 under impact, and the central portion is transmitted to the threaded portion 8A. Here, the threaded portion 8A has a loose play of 12
It will sink in proportion to the amount of time it takes, and as a result it will once again receive a buffering effect. This three-stage gentle action provides the implant denture with the same cushioning as natural teeth. When the occlusal surface is worn or the cushioning material 13 deteriorates, the occlusal part of the upper crown 14 is destroyed to expose the four operating parts 10, as shown in the imaginary line in FIG. Unscrew the screw body 8. Next, the opened receiver is connected to the first cushioning material 15 on the surface 6 and the second a, which is opened through the screw hole 5! After replacing the impact material 13, the screw rest 8 to which the new upper tooth crown 14 is fixed may be screwed on.

Next, the manufacturing process of the denture shown in the above embodiment will be explained based on FIGS. 4 to 7.

First, as shown by the solid line in FIG. 4, the artificial root 1 is planted at a predetermined location on the jawbone/mucosal membrane 2. This implantation is performed according to the shape of each artificial tooth root, and by removing the crown from a conventional implant denture, the artificial tooth root that has been implanted up until now can be used. The upper end of the crown of the implanted artificial tooth root 1 is cut in consideration of the crown space. As shown by the imaginary line in FIG. 4, the screw body 8 is temporarily placed T: together with the first cushioning material 15 via an adhesive 20 that is easy to remove. After molding the lower crown wax 21 from the screw body 8 to the exposed neck part 1B in consideration of the whitening effect, the lower crown wax 21 is removed from the exposed neck part 1B, and the screw body is removed from the lower crown wax 21. 8 is unscrewed to obtain the lower crown wax 21 as shown in FIG. Next, the metal lower crown 3 is manufactured by casting the lower crown wax 21.

Finishing such as polishing is performed on the manufactured lower tooth crown 3. Then, as shown in FIG.
The cushioning material 15 is placed, and the screw body 8 is screwed into the screw hole 5. This screwing is performed until the abutting surface 9 comes into close contact with the receiving surface 6 via the first cushioning material 15, and at this time, due to the elastic repulsive force of the first cushioning material 15, the upward threaded surface of the screw hole 5 and the downward facing surface of the threaded portion 8A.
As shown in the figure, play 12 occurs. Next, the upper tooth crown 14 shown in FIG. 7 is manufactured by polymerizing resin on the head 8B of the screw body. After finishing, they are bonded together. Thereafter, the integrated lower tooth crown 3 and upper tooth crown 14 are externally fitted onto the exposed neck 1B in the oral cavity, but at this time, the first cushioning material 15 is interposed between the end surface 1b and the inner end 8a. Further, an adhesive material 7 is interposed between the through hole 4 and the exposed neck portion 1B, and the adhesive material 7 is externally fitted and bonded to the exposed neck portion 1B.

Effects of the Invention According to the present invention having the above configuration, the occlusal force is first buffered by the upper tooth crown made of resin, and then the cushioning force is buffered at three locations by the screw body sinking in proportion to the play of loose screw engagement. buffer material will be received.

This creates an a-force function in the implant denture,
The occlusal pressure can be adjusted in the same way as with natural teeth, and the connection between the artificial tooth root and the jawbone and mucous membrane can be established permanently, almost like natural teeth, without causing destruction or movement. In addition, since implant dentures have the same balance as natural teeth, they can be implanted in China or Germany without connecting with a bridge, and they can achieve a well-balanced occlusion with the surrounding natural teeth. In addition, to prevent wear on the occlusal surface and deterioration of the cushioning material, destroy only the upper tooth crown and then unscrew the screw body.
Then, by adjusting and manufacturing a new upper tooth crown and screwing the fixed screw body into it, replacement can be easily performed. Furthermore, this technique can be applied to all artificial tooth roots currently on the market.

[Brief explanation of the drawing]

1 to 3 show one embodiment of the present invention, FIG. 1 is a partially cutaway front view, FIG. 2 is an enlarged view of the main part in FIG. 1,
Figure 3 is a plan view of the screw body, and Figures 4 to 7 show the manufacturing process. 1 is an explanatory diagram. 1... Artificial tooth root, 1B... exposed neck, 1b... end surface, 2... jaw bone/mucosa, 3... lower tooth crown, 5...
Screw hole, 7...Adhesive, 8...Screw body, 8a...
Inner end, 10...Four parts for operation, 12...Play, 13.
...Second buffer material, 14...Upper tooth crown, 15...First
Cushioning material agent Yoshihiro MorikiFigure 5

Claims (1)

[Claims] 1. An artificial tooth root to be implanted in the jawbone/mucosal membrane, a metal lower crown fixed to the exposed neck of the artificial tooth root and having a screw hole formed in the center portion to open the end surface of the artificial tooth root, and the screw. A screw body that is loosely screwed into the hole and has a resin-made upper tooth crown fixed thereto, a first buffer material interposed between the screw body and the upper surface of the lower tooth crown, and an inner end of the screw body and the artificial tooth crown. An implant denture characterized by comprising a second buffer material interposed between the end surface of the tooth root and the end surface of the tooth root.