JPH11228328A - Root canal filler composition for dentistry - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dental root canal filler composition hardly bending and breaking on a filling operation, having a sufficient strength capable of surely sealing a root canal and capable of imparting an antibacterial property to a gutta-percha point itself to inhibit the proliferation of bacteria in the root canal. SOLUTION: This dental root canal filler composition comprises trans- polyisoprene and/or gutta-percha, one or more kinds of thermoplastic resins selected from ethylene-vinyl acetate copolymer resin, vinyl acetate resin, ester gums, hydrocarbon resins, and rosin-modified maleic acid resins and having a softening point of 30-100 deg.C, one or more kinds of inorganic fillers selected from zinc oxide, barium sulfate and calcium hydroxide, and an antibacterial agent in a specific ratio.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental root canal filling material composition used for filling a root canal from which dental pulp has been removed in dental treatment.

[0002]

2. Description of the Related Art In general, in the treatment of dental caries in which caries have spread to the pulp, the root pulp is removed by removing the pulp and enlarging the root canal, and filling the cavity of the formed root canal with a thin needle-like gutta-percha point. Tube treatment is performed. This is a treatment aimed at closing the formed root canal cavity, preventing the entry of foreign substances and the like, and preventing infection and the like. This treatment method is called a lateral pressure filling method, and is a method of filling a root canal with several gutta-perture points and closing the root canal by applying pressure.

However, this root canal filling method has various problems. That is, when several gutta-perture points are filled, the strength of the points is insufficient, so that the points are likely to bend or break during the filling operation, and the root canal may not be sufficiently sealed. In addition, since conventional gutta-perture points have no antibacterial effect, if cleaning and sterilization of the root canal during root canal treatment is insufficient, bacteria grow in the root canal and contaminate the root canal. In some cases, it was necessary to perform root canal treatment again or extract teeth.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a root canal that has sufficient strength to prevent bending and breakage during the filling operation and to securely close the root canal, and to impart antibacterial properties to the gutta-percher point itself. An object of the present invention is to develop a dental root canal filling material composition capable of imparting an effect of suppressing the growth of bacteria in the stalk.

[0005]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, specified trans-polyisoprene and / or gutta-perture, a thermoplastic resin, an inorganic filler, and an antibacterial agent. The present invention was completed by investigating that it was possible to obtain a dental root canal filler composition capable of imparting sufficient strength and antibacterial property to a gutta-perture point by combining them in a ratio.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to: A) a transpolyisoprene and / or gutta-perture 5 to 50% by weight B) an ethylene-vinyl acetate copolymer resin having a softening point (JIS K2531) of 30 to 100 ° C. One or more thermoplastic resins selected from vinyl acetate resin, ester gum, hydrocarbon resin and rosin-modified maleic resin 0.1 to 20% by weight C) zinc oxide, barium sulfate, calcium hydroxide One or more selected inorganic fillers: 20 to 94.8% by weight D) An antimicrobial agent: 0.1 to 10% by weight.

In the dental root canal filling composition according to the present invention comprising the components A to D, trans-polyisoprene and / or gutta-perch of the component A is an inorganic filler component which is a component C described below. It is used as a binder, and acts as a root canal filler and gives basic strength. The content of such trans polyisoprene and / or gutta-perture needs to be 5 to 50% by weight, and if it is less than 5% by weight, the shape as a root canal filler cannot be given. If it exceeds 50% by weight, the strength is undesirably reduced.

The softening point of the B component (JIS K2531) is 30 to 100 ° C.
One or two or more thermoplastic resins selected from ethylene-vinyl acetate copolymer resins, vinyl acetate resins, ester gums, hydrocarbon resins, and rosin-modified maleic resins are resins having a hardness required for a root canal filler, It is a component having an effect of improving tensile strength. Such a B component needs to be contained in the dental root canal filler composition of the present invention in an amount of 0.1 to 20% by weight, and if it is less than 0.1% by weight, the hardness and tensile strength are improved. Is insufficient, and if it exceeds 20% by weight, the root canal filling material becomes brittle, which is not preferable.

One or more inorganic fillers selected from the group consisting of zinc oxide, barium sulfate, and calcium hydroxide as the component C, together with the above-mentioned component A, such as transpolyisoprene and / or gutta-percher, are used as root canal fillers. The shape of the
It is a component that acts to impart basic strength. Such a C
The inorganic filler as a component is contained in the dental root canal filler composition according to the present invention in an amount of 20 to 94.8% by weight, and if the amount is less than 20% by weight, the necessary shape impartment and shape retention as the root canal filler are maintained. If it exceeds 94.8% by weight, it becomes hard and cannot be molded, which is not preferable.

The antibacterial agent used as the component D is a component that imparts antibacterial properties to the root canal filling material and has an effect of inhibiting the growth of bacteria in the root canal. The dental root canal filling composition according to the present invention In the range of 0.1 to 10% by weight. As antibacterial agents, inorganic antibacterial agents, organic antibacterial agents and natural antibacterial agents can be used. More specifically, examples of inorganic antibacterial agents include synthetic zeolites supporting inorganic ions such as silver ions, copper ions, and zinc ions, calcium phosphate supporting inorganic ions, vanadium phosphate supporting inorganic ions, and silica supporting inorganic ions. Calcium oxide, silica gel carrying inorganic ions, zirconium phosphate carrying inorganic ions, amorphous carrying inorganic ions, titanium oxide carrying inorganic ions,
There is an oxide photocatalyst carrying inorganic ions. Phenol ether derivatives, sulfone derivatives,
There are imidazole derivatives and the like, and tea catechin, hiba oil and mustard oil can also be used as natural antibacterial agents. These antibacterial agents may be used as a mixture, or an organic antibacterial agent may be supported on an inorganic compound. In the dental root canal filling composition of the present invention, if the content of the antibacterial agent is less than 0.1% by weight, the effect as an antibacterial agent cannot be expected, and if it is more than 10% by weight, the physical properties of the root canal filling material And further effect as an antibacterial agent cannot be expected. Therefore, it is necessary to be in the range of 0.1 to 10% by weight, and preferably in the range of 0.5 to 5%.

Hereinafter, the present invention will be described more specifically with reference to examples.

[0012]

EXAMPLES Example 1 Transpolyisoprene 5.0% by weight Ethylene-vinyl acetate copolymer resin (softening point: 60 ° C.) 0.1% by weight Zinc oxide 94.8% by weight Synthetic zeolite supporting silver ions 0.1% by weight % The above components were weighed and kneaded sufficiently with a kneader to prepare a dental root canal filler composition. The hardness was also measured by softening this composition at 130 ° C., inner diameter: 12 mm, height 8 mm
, And after pressing and cooling with a metal plate on the upper and lower sides, the hardness was measured using a spring type hardness tester A type described in JIS K6301. In addition, the measurement of tensile strength is based on JIS K6
The measurement was carried out using a No. 301 dumbbell-shaped punching die. The antibacterial test uses Candida bacteria as the bacterial species,
As a control, the number of viable cells after 24 hours of culture was measured using GC gutter percha points. The test results are summarized in Table 1.

Example 2 Transpolyisoprene 50.0% by weight Hydrocarbon resin (softening point: 90 ° C.) 20.0% by weight Zinc oxide 15.0% by weight Barium sulfate 10.0% by weight Tea catechin 5.0% by weight After the above components were weighed and kneaded sufficiently using a kneader to prepare a dental root canal filler composition, various tests were performed in the same manner as in Example 1. The test results are similarly summarized in Table 1.

Example 3 Transpolyisoprene 25.0% by weight Vinyl acetate resin (softening point: 40 ° C.) 10.0% by weight Calcium hydroxide 55.0% by weight Silver ion-supported titanium oxide 10.0% by weight Each of the above components Was weighed and kneaded sufficiently using a kneader to prepare a dental root canal filler composition, and various tests were performed in the same manner as in Example 1. The test results are similarly summarized in Table 1.

Comparative Example 1 Transpolyisoprene 15.0% by weight Zinc oxide 85.0% by weight The above components were weighed and kneaded sufficiently using a kneader to prepare a dental root canal filler composition. Various tests were performed in the same manner as in Example 1. The test results are similarly summarized in Table 1.

Comparative Example 2 GC Corporation: The same test as in Example 1 was performed using GC gutter percha points, and the results are shown in Table 1.

[0017]

[Table 1]

[0018]

As described above, the dental root canal filling compositions of Examples 1 to 3 according to the present invention can be obtained by using the root canal filling composed of trans polyisoprene and zinc oxide of Comparative Example 1 or the current root canal filling material of Comparative Example 2. Higher hardness and tensile strength compared to GC garter percha point, which is a product, does not break even when filling the root canal, can sufficiently seal the root canal, and has antibacterial properties Therefore, it is a dental root canal filling material composition in which the growth of bacteria in the root canal is suppressed, and there is very little need to perform another root canal treatment. As described above, the dental root canal filling composition according to the present invention is a very effective material for root canal treatment in dental treatment, and can be said to be a very useful material for operators and patients.

Claims (2)

[Claims] 1. A) transpolyisoprene and / or gutta-perch 5 to 50% by weight B) Ethylene-vinyl acetate copolymer resin having a softening point (JIS K2531) of 30 to 100 ° C., vinyl acetate resin, ester gum, One or more thermoplastic resins selected from hydrocarbon resins and rosin-modified maleic resins 0.1 to 20% by weight C) One or two or more selected from zinc oxide, barium sulfate and calcium hydroxide (D) an antibacterial agent in an amount of 0.1 to 10% by weight. 2. An antibacterial agent comprising a synthetic zeolite carrying an inorganic ion of silver ion, copper ion, or zinc ion, calcium phosphate, vanadium phosphate, calcium silicate, silica gel, zirconium phosphate, amorphous,
An inorganic antibacterial agent selected from titanium oxide and oxide photocatalyst,
Organic antibacterial agent selected from phenol ether derivative, sulfone derivative, imidazole derivative, natural antibacterial agent selected from tea catechin, hiba oil, mustard oil 1
The dental root canal filler composition according to claim 1, which is one or more antibacterial agents.