JPS6048179B2 - artificial tooth root - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a resin artificial tooth root, and more particularly to a resin artificial tooth root having a periodontal ligament function.

As shown in the cross-sectional view of the tooth in FIG. 1, the periodontal ligament 2 is attached to the outer wall of the tooth root 1a of the tooth 1, and serves to buffer the occlusal impact and maintain the tooth 1 itself.

It is already well known that the tooth 11 that has been extracted once is regrown in the extraction socket 12 and fused to the jawbone 13 as shown in Figure 2, but if we look at this from the anatomical perspective of the tooth 11 and jawbone 13. The tooth 11 and the jawbone 13 are in a state of direct fusion 14 and regrowth.

The fact that the tooth 11 and the jawbone 13 are directly fused 14 in this way means that the periodontal ligament is completely lost at that point, which means that part of the function of the tooth body is stimulated by the occlusal pressure received from the outside. The disadvantage was that the buffering function of the periodontal ligament was completely lacking.

The present invention provides an artificial tooth root that can eliminate these conventional drawbacks, and its purpose is to establish an artificial tooth root that has the elastic function of the periodontal ligament and the buffer function that alleviates external stimulation. The goal is to make it possible.

Another purpose is to reduce the impact and force required for the artificial tooth root to heal, thereby speeding up the healing process.

In other words, the present invention is characterized by molding an artificial tooth root having a bonding part made of a polymeric resin that can adhere to the jawbone and is not absorbed by the bone after adhesion, to which essential components of teeth and bones are added. The artificial tooth root is planted in an extraction socket or a cavity, and the crown is connected to the jawbone by a post-fusion joint. More specifically, calcium titanate 5 to 2
An artificial tooth root a is molded with a resin 21 to which essential components of teeth and bones such as 5% or 4 to 10% calcium are added, and a connecting part that matches the shape of the tooth extraction socket or the cavity formed in the jawbone is molded. An artificial tooth root a is planted in an extraction socket 22 or a cavity 23, an abutment tooth 25 is connected to the jawbone 24 through a bonding part b, and a crown 26 is repaired thereon.

Further detailed description will be given below with reference to the illustrative drawings.

FIG. 3 shows an artificial tooth root a with a connecting part b molded according to the form of the tooth extraction socket 22 shown in FIGS. An outflow guide groove 27 for exudate such as blood and lymph coming out from the connection site is provided in the form of a spiral vertical groove or the like.

Further, a screw hole 35 is provided in the center of the upper surface of the artificial tooth root a to form a screw-type joint b.

FIG. 4 shows an artificial tooth root a having a connecting part b formed by incising and peeling off the tooth protrusion shown in FIGS. For example 4
It is formed into a columnar planar shape consisting of wing parts 28, a through hole 29 is bored in the wing parts 28, and a screw type joint part b is formed in the center of the upper surface. FIG. 5 shows a state in which the artificial tooth root a shown in FIG. 3 is inserted and planted in the tooth extraction socket 22.

In this case, the screw hole 35 has a screw 31 attached to the turning tool mounting head 30.
is screwed on. When this artificial tooth root a is planted in the tooth extraction socket 22, exudates such as blood and lymph that come out from the ostium of the blood vessel after connecting blood vessels and nerve fibers to the jawbone and tooth are discharged through the outflow guide groove 27. In this way, the blood clot that spread around the artificial tooth root a was replaced by granulation tissue, and due to the action of the additives added to the resin, osteoblasts and chondroblasts invaded, and new bone growth was observed. No foreign body expulsion reaction was observed and adhesion 32 was achieved with high tissue affinity. After adhesion, screws 3-1 are inserted into screw holes 3 using a turning tool as shown in Figure 6.
5, then the abutment tooth 25 with screw 33 is screwed on as shown in FIG. 7, and then the crown part 26 is repaired.

FIG. 9 shows a state in which the artificial tooth root a shown in FIG. 4 has been planted in the cavity 23, the abutment tooth 25 is screwed on, and the crown portion 26 has been repaired. It shows the status.

FIG. 10 is a cross-sectional view showing a state in which the artificial tooth root a has fused 32 to the jawbone 24. The wings 28 of 4 provide great stability, and the bone marrow 34 is inserted into the through hole 29 drilled in the wing 28. proliferates and adheres securely. Although the connecting portion is shown as a screw type, it goes without saying that it may be of a pin type, a blade type, or the like. Further, a metal bonding portion may be embedded in the resin artificial tooth root of the present invention. In this way, only the artificial tooth root a is connected to the jawbone 2.
4. Since the artificial tooth root a is implanted and allowed to fuse, there is less external shock and stimulation due to occlusal impact until the healing process, which speeds up the healing process, and provides appropriate protection from the time the artificial tooth root a is implanted until the healing process is completed. The trouble of retaining the device and retaining device is also eliminated.

Furthermore, the artificial tooth root a is quickly and accurately adhered, and the elasticity of the resin exerts a relaxing effect on external stimuli, resulting in an artificial tooth root with excellent periodontal ligament function, which is highly effective. Incidentally, a plastic bone composition (Japanese Patent Publication No. 10984/1984) is known. This method involves mixing polymethacrylate with ground inorganic bone and using this as a bone composition. This bone composition is coated on a metal shaft to form a pin, and this pin is attached to the gums using a tripod. , which is implanted into the bone to fix and secure the crown of the tooth. However, polymethacrylate has been difficult to put into practical use due to harmful effects caused by monomer leakage, and has no tissue compatibility.

In addition, since the pin-shaped material is embedded, it is easy to remove it, and in addition, the core material must be made of a metal shaft because the polymethacrylate has weak points in terms of strength, which also poses manufacturing difficulties.
It has been impossible to manufacture a tooth extraction socket or a cavity formed in the jawbone. However, in the present invention, an artificial tooth root with a connecting part is made of a polymer resin that can adhere to the jawbone and is not absorbed by the bone after adhesion, with essential components of teeth and bones added, and is molded to fit the tooth extraction socket or cavity. This artificial tooth root was extracted or implanted in a cavity, the crown part was connected to the jawbone by a symphysis after fusion, and the artificial tooth root was molded into a planar shape consisting of three or more wing parts. Therefore, an artificial tooth root made entirely of composite resin has been formed using polymer resin to match the shape of a tooth extraction socket or a cavity formed in the jawbone, and dental medicine has made great progress.

In other words, by composite resin molding, an artificial tooth root made entirely of composite resin that does not require a metal core material can be obtained, and since it is made of polymer resin, the root part requires tens of times more strength than the crown part. It has sufficient strength to withstand the required strength, and has excellent medical practicality as there is no monomer leakage and there is no fear of harmful effects. In addition, the resin artificial tooth root matches the shape of the tooth extraction socket or the cavity formed in the jawbone, and it has a planar shape consisting of three or more wing parts, so the addition of polymer resin to the tooth and bone is essential. Combined with the action of the ingredients, it becomes an artificial tooth root with excellent tissue-compatibility and periodontal ligament function without the fear of extraction. Further, since the upper surface has a connecting portion with a screw threaded thereon, the screw hole is not clogged and the abutment tooth can be reliably attached.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show examples of the present invention, and FIG. 1 is a cross-sectional view of a tooth with a periodontal ligament, FIG. 2 is a cross-sectional view of a replanted tooth without a periodontal ligament, and FIG. Figure 4 is a perspective view of the artificial tooth root of the present invention, Figure 5, Figure 6, Figure 7, and Figure 8 are sectional views showing the installation order of the artificial tooth, and Figures 9 and 10 show other embodiments. FIG. 21...Resin, 22...Tooth extraction socket, 23.
... cavity, 24 ... jawbone.

Claims (1)

[Scope of Claims] 1. An artificial tooth root having a bonding part made of a polymeric resin that can adhere to the jawbone and is not absorbed by the bone after adhesion, with essential components of teeth and bones added, is placed in an extraction socket or a cavity. An artificial tooth root characterized in that the artificial tooth root is molded together, the artificial tooth root is planted in a tooth extraction socket or a cavity, and the crown part is connected to the jawbone by a symphysis after fusion. 2. Claim 1, characterized in that the artificial tooth root is formed into a planar shape consisting of three or more wing parts.
Artificial tooth root as described in section.