JPS61246108A - Curable paste for root canal filling - Google Patents

Abstract

PURPOSE:To provide the titled paste consisting of the first component composed of hydroxyapatite, magnesium oxide and an X-ray contrasting material and the second component composed of guaiacol and eucalyptol and useful for the protection and remedy of the root apex lesion in dental treatment. CONSTITUTION:The titled two-pack type paste consists of (A) the first component composed of 40-60wt% (based on the whole weight of the first component) hydroxyapatite, 15-25% magnesium oxide and the remaining part of an X-ray contrasting material (e.g. barium sulfate, bismuth subcarbonate, silver powder, etc.) and (B) the second component composed of 35-60% (based on the whole weight of the second component) guaiacol and the remaining part of eucalyptol. The paste has excellent affinity to living tissue and low irritation to tissue, promotes the cure of the peripheral tissue of root apex and is expected to close the root apex. It is useful also as a restoration material of bone defect. The first component and the second component are kneaded at a rate of 4:1 in use.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hardening glue material for root canal filling used in dental treatment.

[Conventional technology]

The purpose of root canal filling operations in dental treatment is to protect and heal the root end wound by applying root canal filling material to the empty root canal system after pulp extraction or infected root canal treatment. It is said that Therefore, it can be said that such treatment as a pre-stage to dental prosthetic treatment is one of the most frequently used treatment methods in general dentistry clinical practice.

By the way, various root canal filling materials have been used for this kind of treatment, but these are mainly therapeutic materials such as glue threads (for example, hydroxide μsium thread glue material).
It can also be divided into solid types (for example, gutta percha points) that are mainly physically sealed.

However, even with a solid root canal filling material, in order to securely seal the root end, it is necessary to fill the root canal in combination with a sealer and a type of sealing material called a sealer. Furthermore, among sealers, there is a type that hardens after a certain period of time after being kneaded and is called a hardened solid (cement type) root canal filling material.

[Problem that the invention seeks to solve]

Among these, as a conventionally known cement type root canal filling material, zinc oxide eucinol cement, which contains zinc oxide as a main component and contains nisinol mixed therein, has been widely used. However, zinc oxide nisinol cement is said to have a certain degree of tissue irritation to the tissues surrounding the root tip, and cannot be said to be satisfactory as a so-called biological root canal filling material.

[Means for solving problems]

In view of the above circumstances, in recent years hydroxyapatite, which is known as an inorganic component of living hard tissues such as teeth and bones, has been applied to dental implants, artificial bones, etc. due to its excellent biocompatibility. However, as a result of various studies conducted by the present inventors on the effects of hydroxyapatite on the living body, particularly on the dental pulp and tissues surrounding the root tip, we found that a root canal filling material containing hydroxyapatite as its main ingredient is clinically applicable. The first material was found to be of high value and contains magnesium oxide as an active ingredient, and these X-ray contrast materials are combined, and the second material contains guaiacol and eucalyptus-P as the main components. The purpose is to provide a two-material type root canal filling material.

[Structure of the invention]

In the hardening type glue material for root canal filling of the present invention, the structure of the first material 6 is such that hydroxyapatite is blended in an amount of 40 to 60% by weight based on the total weight of the first material, and magnesium oxide is also added to the total weight of the first material. 15 to 25 weight of the same amount.

On the other hand, guaiacol constituting the second material is blended in an amount of 35 to 60% by weight. In addition, essential oils such as Neishino/L/ or clove oil may be used in place of this guaiaco. Further, as an X-ray contrast material, appropriate amounts of bismuth subcarbonate, barium sulfate, etc. are mixed.

Such a hardening type glue material for root canal filling according to the present invention is as follows.
It is used by kneading the first material and the second material, but the first material
Although the mixing ratio of the first material and the second material can be arbitrarily selected depending on the desired finished state, according to the trial results, 4:
The kneading state at a ratio of 1 (weight ratio) was optimal. Although the wood completely hardens in the oral cavity in about 40 minutes after kneading, the hardening time can be adjusted as appropriate by changing the formulation of the second material.

(Evaluation) The glue according to the present invention was applied to 150 root canals of mandibular premolars of 15 adult dogs, and after 3 months, the root canals were layered and histopathologically searched, and the results shown in Table 1 were obtained. .

As is clear from Table 1, gluing with these tissues promoted biological healing of the root tip and had excellent effects as a root canal filling material.

Next, the present invention will be specifically explained using examples.

Example 1゜First material formulation (powder form) Hydroxyapatite 52.5% Magnesium oxide 22.5% Bismuth hypooxide
25% 1st Table 2 Material formulation (liquid) Guayacor tv 38.5% Polysorbate 20 57.5% Eucalyptus/L/ Example 2 of obtaining glue for root canal filling with a formulation of 4.0% or more 1 ingredient formula (powder) Hydroxyapatite 60% Magnesium oxide 20.0% Bismuth subcarbonate 20% 2nd ingredient formula (liquid) Guaiacol 33.5% Eucalybutol 10% Polysorbate 20 56.5% or more Example 3 for obtaining glue for pipe filling First material formulation (powder) Hydroxyapatite 55.0% Magnesium oxide 20% Barium sulfate 37.5% Second material prescription (
Liquid) Guaiacol 37.5% Eucalyptus/L/5% Polysorbate 20 Example 4 of obtaining a root canal filling effect material with a formulation of 57.5% or more First material formulation (powder) Hydroxyapatite 60% Magnesium oxide 20 % Silver powder 20% 2nd material formulation (liquid) Guayaco/'L/ 38% Eucalyptus A/ 4% Polysorbate 2058% Obtain glue for root canal filling with the above formulation [Effects of the invention] As the main component of the root canal filling material of the present invention is hydroxyapatite, it has excellent affinity with living tissue, and therefore has little tissue irritation and is easily filled into root canals. In this case, it can be expected that the healing of the tissues around the root end will be promoted and that the root end will eventually be closed. In addition, in cases involving alveolar bone resorption, the filling material that overflows outside the plate end hole is included in new bone as the area heals, and it has excellent properties such as serving as a prosthetic material for bone defects. be effective.

Furthermore, the filler of the present invention consists of a first material cut from a powder and a second material which is a liquid. Gatsuta percha cures completely in the oral cavity in about 40 minutes after being cured.
It is extremely useful as a cooler for root canal filling in combination with points.

In addition, because it contains bismuth subcarbonate, barium sulfate, etc., it has appropriate xI@contrast properties and can easily confirm the shape of the root canal filling, resulting in excellent root canal filling effects. Can be done.

Claims (2)

[Claims] (1) A first material containing hydroxyapatite, magnesium oxide, and an X-ray contrast material, and a second material containing guaiacol and eucalyptol as main components.
Hardening glue material for root canal filling. (2) Claim 1, wherein the X-ray contrast material is barium sulfate, bismuth subcarbonate, silver powder, etc.
Curing glue for root canal filling as described in Section 1.