JPH05201825A - Dental root canal filler - Google Patents

Abstract

PURPOSE:To accurately and readily make a shape and a size instead of a conventional gutta-percha point according to a standard and to carry out high- degree digestion and sterilization. CONSTITUTION:A dental root canal filler which comprises polytetrafluoroethylene as a main compound instead of gutta-percha, a main agent of conventional gutta-percha point and can be disinfected and sterilized by heating under pressure in an autoclave. The filler can be produced by an injection molding machine and readily and accurately manufactured in a shape and size corresponding to the ISO standard. A medicine can be inserted into a root apex by preparing a medicine retaining part at the tip of a point.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a new dental root canal filling material. More specifically, it is a dental root canal filling material mainly composed of polytetrafluoroethylene.

[0002]

2. Description of the Related Art Dental root canal filling materials conventionally used are gutta-percha points whose main component is gutta-percha. The gutta-percha point has a softening temperature of about 70-
Since it was 80 ° C, boiling sterilization was impossible. Therefore,
For disinfection, a dentist generally used a rubbing alcohol to wipe only the surface before filling the root canal. In addition, a highly advanced method was to disinfect and sterilize the surface of the gutta-percha point by generating formaldehyde gas from paraform, which is a polymer of formaldehyde.

In addition to the above-mentioned disinfection and sterilization methods, the filling material point of the present invention can be heated and autoclaved by an autoclave, and the disinfection and sterilization has become more advanced.

The shape and size of the gutta-percha point, which is generally used as a root canal filling material, is defined by ISO, and its tolerance is ± 0.04 mm. However, this gutta-percha point is
Since it is handmade, 2/3 or more of the created products are often nonstandard products.

Since the root canal filling material of the present invention can be produced by injection molding, a standard size article can be accurately produced by adjusting the mold.

[0006]

The conventional gutta-percha points are hand-made and time-consuming, and the yield of standard products is low. In addition, disinfection and sterilization are not perfect, and there are problems in hygiene.

[0007]

As described above, since the root canal filling material of the present invention is produced by injection molding, a standard size article can be easily produced by adjusting the mold. In addition, it is possible to create a different shape by creating a mold, and thus it is possible to insert a drug into the apical foramen. In addition to the conventional disinfection and sterilization methods by the material of the present invention, heating by autoclave and pressure sterilization are possible, and a high degree of hygiene treatment is possible. Since the material of the present invention is polytetrafluoroethylene, which is a blank test material used as a biological evaluation test, its safety has been proved by many experimenters.

Similar to the conventional gutta-percha point, the root canal filling material of the present invention is mixed with a contrast agent by X-ray necessary for confirming the filling state. Barium sulfate, bismuth subcarbonate or bismuth trioxide is used as a contrast agent, and an amount capable of being imaged is mixed with an amount of 3% or less of polytetrafluoroethylene. Also, a small amount of pigment can be mixed for aesthetics.

[0009]

Examples Polytetrafluoroethylene 100 parts by weight Barium sulfate 3 parts by weight Injection molding at a temperature of 260 ° C. using a mold prepared by taking into consideration shrinkage of polytetrafluoroethylene after processing. did. The filler after processing was within the tolerance range. After heating in an autoclave and autoclaving, it was negative in a bacterial culture test (37 ± 0.5 ° C., 7 days) on an ordinary agar medium. The root canal filling is performed by the lateral pressure filling method (Lateral condensatio) which has been conventionally performed.
n method).

[0010]

The root canal filling point can be formed by injection molding by using polytetrafluoroethylene instead of the gutta-percha point which has been conventionally used as a root canal filling material. Therefore, a product having a form and size conforming to the ISO standard can be accurately created. In addition to conventional disinfection and sterilization methods, heating and pressure sterilization are possible, which can further improve hygiene. Also, if there is an infected lesion at the apex, it is not possible to process the tip by gutta-percha point to make a holding part, so it was only possible to inject the drug from the root canal with a plugger etc. .. In the present invention, a drug holding portion is made at the tip of the point,
The drug can be placed in this portion and the drug can be inserted into the apex.

[Procedure amendment]

[Submission date] April 18, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

4. The dental root canal filling material according to claim 2, which comprises coating the surface of the polytetrafluoroethylene point with the X-ray contrast agent silver, gold or palladium.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] Paragraph number "0008"

[Correction method] Change

[Correction content]

[0008] The root canal filling material of the present invention is mixed with the contrast agent by X-rays necessary for confirming the filling state, as in the conventional gutta-percha point. As a contrast agent, barium sulfate, bismuth subcarbonate [(BiO) ₂ CO ₃ 1 /
2H ₂ O] or bismuth trioxide is used, and a contrastable amount of 3% or less of polytetrafluoroethylene is mixed. In addition, the surface of the polytetrafluoroethylene point X
Vacuum deposition, painting, etc. with the line contrast agent silver, gold or palladium
To coat. Also, a small amount of pigment can be mixed for aesthetics.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] Paragraph number "0009"

[Correction method] Change

[Correction content]

[0009]]

Example 1 Polytetrafluoroethylene 100 parts by weight Barium sulfate 3 parts by weight The above mixture was injected at a temperature of 260 ° C. using a mold prepared in consideration of shrinkage after processing of polytetrafluoroethylene. Molded. The filler after processing was within the tolerance range. After heating in an autoclave and autoclaving, it was negative in a bacterial culture test (37 ± 0.5 ° C., 7 days) on an ordinary agar medium. The root canal filling is performed by the lateral pressure filling method (Lateral condensatio) which has been conventionally performed.
n method).

[ Example 2 ] Polytetrafluoroethylene with silver as an evaporation source
The surface of the points was vacuum evaporated. By adjusting the mold and molding conditions at the time of manufacturing points, products within the tolerance range were obtained. According to the ISO standard, contrast of X-ray opacity of 6 mm or more of pure aluminum is specified, but the opacity is 8 mm or more. In particular, silver is effective as a coating agent for root canal filling points because it has bactericidal activity.

Claims (3)

[Claims] 1. A dental root canal filling material mainly composed of polytetrafluoroethylene. 2. The root canal filling material for dental roots according to claim 1, comprising polytetrafluoroethylene and an X-ray contrast agent. 3. The dental root canal filling material according to claim 2, wherein the X-ray contrast agent is barium sulfate, bismuth subcarbonate [(BiO) ₂ CO ₃ 1 / 2H ₂ O] or bismuth trioxide.