JPS63501959A - alternative tooth root - 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] alternative tooth root The present invention allows one or several teeth to be artificially removed, either immediately after tooth extraction or after restoration. After that, a physiologically compatible transplanted organ that does not cause physiological alterations is used as a replacement. Ru.

The present invention can also be used for oral medical purposes to treat the destruction of jawbone or mandibular bone caused by alveolar disease. It is also intended to be used as a replacement organ for prosthetics.

It is known that healthy teeth fit into the alveolus and are connected to the alveolus by ligaments. ing.

The formation of alveolar bone is related to the presence and propagation of teeth. When one or more teeth are removed, Cytolysis of the alveolar bone occurs, and the tissue surrounding the extracted tooth is destroyed.

Titanium, alumina or carbon porcelain implants to replace missing or extracted teeth Suggested for public use. Or, to partially restore the destroyed alveolar tissue. It has also been proposed to use hydroxyapatite in various forms for this purpose.

In organ transplant medicine, physiological compatibility and strength of the transplanted organ are important.

These are two supreme commands.

The transplanted organs used today require bone rejection of the material from which they are made. There seems to be little reaction, and the mechanical strength seems to vary depending on the material used. , the problem of physiological compatibility appears to have been resolved.

French patent N7918120 already proposes the use of coral as a prosthetic organ. I devised a plan. Due to its porosity, the coral proposed by this patent inventor can last for 3 to 4 months. The bone invaded the transplanted coral and formed the Haversian system. It was like making something happen. For bones to penetrate into coral, the pores must be at least 30 mi. The inventor writes that Ron is sufficient.

The invention is characterized by the use of a calcium carbonate material with a very hard crystalline structure.

This calcium carbonate material is Herpolita-5eriatopora-Fo ngia-Pocillopora-Millepora coral ium Johnsoni Gray type octocoral insects, and other special features listed above. It consists of coral with distinctive characteristics, and its pores are less than 10 microns in size. And in reality is an artificial form of calcium carbonate.

Propagates bone around the alveolus and tooth replacement organ unit, preventing it from penetrating the implanted object. A chemical trend occurs in which the object is unable to form a true bony bone union with the object. Koru. The crystalline structure of coral, basically aragonite or calcite, is composed of calcium phosphate. This explains why calcium carbonate is physiologically compatible. It's clear.

The replacement tooth root is similar to the natural tooth root, with low porosity, and its pores differ in size and diameter. It can be a slightly cylindrical piece made of very hard calcium carbonate.

The preferred organ according to the invention, although not limited thereto, is The cylindrical outer surface has a Z-shaped design that prevents it from coming off and makes it immediately stable. It has the shape of a tenon with different diameters and lengths. the end of this protrusion is oriented diagonally, giving the appearance of an internal thread as a whole. This invention On the external surface of the organ, there is a wall that is half its height so that the organ does not rotate when the bones multiply. Two perpendicular and symmetrical notches are made.

The organ according to the invention has a cylindrical pit drilled in its center.

The circumference of the circle at its upper end is swollen. Its lower end is double-sided to allow maximum surface contact. It has a mask.

The organ according to the invention has the form of a cylindrical tenon, with two shaped grooves in a part of its height. It can be something like that with a circular projection. And even if there is no bulge The lower part 2I[n is smooth and prevents the organ of the present invention from rotating when the bone grows. There are two symmetrical cuts that can be of different depths.

Next, examples of the present invention will be described, but the present invention is not limited thereto.

Twelve laboratory animals (beagles) were selected for the experiment of the present invention and another twelve for comparison. I did.

Example 1- The organ according to the invention, prefabricated into the preferred form mentioned above, is cleaned of any residues. To remove it, treat it with hypochlorite, rinse it thoroughly with water, and apply cold sterilization. Ta. The organ was then placed into the tooth socket where the tooth was extracted. A mucous suture is made and the artificial appearance is isolated from the oral cavity.

Example 2- The organ according to the present invention made and treated in the same manner as described above is placed in the alveolus where new tissue has formed. It was placed inside and a mucous suture was placed.

Example 3- The organ according to the invention, treated as in Example 1.2, was placed in the jawbone and in the alveolus after tooth extraction. It was placed inside the tooth socket where new tissue had formed. The upper end protruded 2 mm into the oral cavity.

Example 4- Fragments of the organ according to the invention, treated as before, were placed on the palate and anterior surface of two adult dogs. I went to the garden.

Laboratory tests (calcium blood content) performed at regular intervals over a three-month period Volume-vS-electrophoresis) was normal, but there was some increase in vS 48 hours after surgery. this is a temporary and normal bacterial action after surgery in septic areas.

Example 5- After complete dentoalveolar amputation was performed on one animal in the laboratory, a specimen of the same size as the excised organ was found. A parallelepiped-cut organ according to the invention was inserted.

According to X-ray examinations carried out at equal intervals, the organ according to the present invention If the coral is made of hard coral with extremely fine pores of less than 200 yen, all cases will be damaged after 16 weeks. The coral fragments are intact and have not been altered in any way as seen by X-ray examination. did not exist.

According to experiments, the size of the coral fragment was not the shape of the organ of the present invention, and it was found that it was not possible to forcefully insert it into the tooth socket. When inserted, the coral fragments have a tendency to expel after 6 to 8 weeks in some cases. I was receiving This is because the bone-forming force deep inside the cavity is the retaining force that comes from the preferential shape of the organ of the present invention. Therefore, the balance was not maintained.

In fact, if the organ has the shape of the present invention, this phenomenon will not occur; It has a slightly cylindrical tenon shape, and has a spiral protrusion around its height and circumference. Its projections have a Z-shaped structure that immediately stabilizes the artificial root and favors bone formation. The area around the organ is coated with ink to resist the vertical ejection force. That is.

Another preferred form of the organ according to the invention has a thickness of 3 m and a length of 15++ m - 35 nn. , It has the shape of a parallelepiped alveolar/root unit of #9m++, and in the center of its lower surface Along the length, the base is 4nyn and the top is 311I! 1. A swallowtail-shaped protrusion with a height of 3m. It is something I have. And it has one of the different diameters cut into an internal thread. Two holes are drilled, and the shape and size of the holes are similar to that of a cylindrical tenon. The organ according to the invention can be inserted.

In humans, the organ according to the invention was tested in 12 cases.

Immediately after the organ of the present invention was removed, it was also inserted into the alveolus where new tissue had formed.

Example 1- The organ of the present invention was placed in the tooth sockets in which new tissue had been formed in five patients.

Tests carried out at regular intervals revealed no biological alterations. I couldn't. Also, - in the afternoon, there is no reabsorption of the materials used, and the organ is completely connected to the surrounding tissue. It was integrated.

Example 2- The other five patients had the organ of the invention inserted into the empty tooth socket after extraction.

According to X-ray examination, there was no bone invasion of the graft material, and the materials used were completely identical. It was embodied.

Example 31 The alveolar-root unit preferential organ according to the invention was tested in 12 cases. P After incising the mandibular mucosa of a Guru dog, a bone measuring 4 m wide, 3 mm deep, and 15 m++ long was removed. A groove was made and the alveolus in which new tissue had formed was cut into an internal thread. The organ of the present invention is placed inside it. It was inserted through a swallowtail-shaped tenon and held in place by filling the area with some kind of material.

The mucosa was incised and sutures were placed.

Clinical and radiographic examinations revealed that the inserted organ was fully stabilized by a swallowtail-shaped tenon and an artificial root. It was found that it was firmly fixed.

The following was confirmed through animal and human experiments.

1) The bone-forming force around the implanted tissue has a draining effect due to the preferential shape of the organ according to the present invention. I won't wake you up.

2) Every time the transplanted tissue is removed or expelled, the surface is coated with the coral used. Bony bone adhesion existing between bones was observed, and bone production, which is a recovery effect, was observed. We also confirmed how fast elephants are. This means that the properties of the materials used themselves induce bone formation. proves that.

3) Because the porosity of the material used is small, the material is hard and prevents bone intrusion, making it easy to assemble the graft. This ensures that the fabric is integrated with its surroundings.

4) The mechanical and physical properties of the coral system used are as follows: solution of 5alt water) or physiological fluid stains the coral used. I'm at my best when I'm busy. On the other hand, when coral is used in a dry state, its characteristics sex is significantly reduced.

Its properties (elasticity, tensile stress, counter pressure, shear stress, torsional stress) vary depending on the type of coral. are very close to natural characteristics.

The accompanying drawings diagrammatically represent the invention. However, the present invention is limited to this. It's not something you can do.

FIG. 11(2) is an example showing the entire organ according to the present invention.

Figure 12The organ diagrammed in Figure 1(2) is equipped with an internally threaded tenon; On the outer surface of the tenon, there is a Z-shaped spiral protrusion 1 - for inserting all of the anterior prosthetic superstructure. Center hole 2 - upper end with bulge in circumference to position the prosthetic anterior superstructure 3 - the lower end of the dihedron 4 - half of its outer surface is cut with symmetrical vertical grooves 5 ゜ FIG. 2 is a diagram of the alveolar/root substitute of the present invention.

The organ represented in Figure 2 is a parallelepiped element with a length of 15 mm, a width of 9 m, and a thickness of 3 1, and a swallowtail-shaped protrusion on its lower surface with a thickness of 3 m along its length, a base of 4 m, and a crest of 3 glues. 2, with a female thread cut into the center for inserting the artificial root. hole 3 has been drilled.

Procedural amendment (voluntary)

Claims (15)

[Claims] 1. An alternative tooth root characterized by being made of natural calcium carbonate. 2. The alternative tooth root according to claim 1, which has a low porosity structure. . 3. Claims 1 and 2 characterized in that the pores are 10 microns or less. Alternative tooth root as described. 4. Claims characterized in that the material is aragonite or calcite. Alternative tooth root according to some terms. 5. Claims characterized in that the material is made of extremely hard stony coral bone. Alternative tooth root according to any of the items listed in the previous section. 6. Coral is Herpolita-Pocillopora-Fongia-Se riatopora-mellepora, white, pale auburn, brown, or black. , Corallium J. Patent claim characterized by being of Greay type Range of substitute tooth roots according to any of the items listed in the previous section. 7. Slightly cylindrical tenons of different dimensions with a Z-shaped spiral protrusion on the outer surface. An alternative tooth root according to any of the preceding claims, characterized in that it has a shape . 8. A vertical pit is dug in the center of the claim. Alternative tooth roots according to some of the items listed above. 9. It is characterized by two vertical and symmetrical grooves cut into half of its outer surface. An alternative tooth root according to any of the preceding claims. 10. The preceding claim, characterized in that the circumference of the upper end portion is swollen. Alternative tooth roots according to some of the items listed. 11. The lower end of the claim is characterized in that it is dihedral. Alternative tooth root due to nuchal. 12. One or two holes are drilled through which one or two artificial roots can be inserted. It is a parallelepiped with a shape in which the alveolar and tooth roots are combined. Claims: An alternative tooth root according to any of the matters described in the preceding paragraph. 13. Patent claims characterized by cold sterilization with gamma rays or trioxymethylene Range of substitute tooth roots according to any of the items listed in the previous section. 14. The preceding claim is characterized in that it is preserved in sterile saline with high osmotic pressure. Alternative tooth roots according to some of the items listed. 15. It is characterized by replacing one or several destroyed natural tooth roots or alveolar parts. An alternative tooth root according to any of the preceding claims.