JP2824528B2 - Root canal filler composition - Google Patents

Description

The present invention relates to a hardened root canal filler composition used as a root canal filler in the field of dental treatment.

The root canal filling operation in the field of dental treatment is performed by applying a root canal filler composition to occlude the root canal after the removal of the medullary nucleus or after the treatment of the infected root canal, thereby protecting and recovering the apical wound. This is a procedure for preserving teeth.

Conventionally, for such a treatment, a non-hardening glue root canal filling material (for example; formalin type) or a hardening glue root canal filling material (for example, for the purpose of accelerating apical treatment or treating bone scars) Zinc oxide-eugenol type) or a solid root canal filler (eg, gutta-percha point) for physical obstruction. Among them, the non-hard glue root canal filling material can be expected to treat tissue, but it is not hardened in the root canal, so there is concern about long-term application. In addition, the solid root canal filling material only physically closes, and tissue healing cannot be expected.

On the other hand, a curable glue root canal filling material that hardens in the root canal after a certain period of time after kneading can be expected to achieve both the purpose of tissue healing and root canal occlusion. Also, when used in combination with a solid root canal filler as a sealer, a solid root canal filler such as a gutta-perchaunt is fixed to the root canal wall,
It can be expected that there will be no dead space.

As the curable glue root canal filler, conventionally, zinc oxide is used as a main component, and Zn is used by mixing it with eugenol.
O-Euginol cement has been widely used. However, the components of this cement are completely different from the components of the teeth and are not necessarily satisfactory materials in terms of tissue compatibility.

In order to solve this problem, a curable glue root canal filling material has recently been proposed in which hydroxyapatite similar to the main components of bone and teeth is added to powder and kneaded with this and guaiacol. . However, these known techniques have a problem that the collapse rate of the cured product is high and the required performance as a root canal filler is not satisfied.

The present invention comprises a powder mainly composed of calcium phosphate powder having a composition similar to the main components of bones and teeth as well as hydroxyapatite, an organic acid in an aqueous solution, a water-soluble polyhydric alcohol and an X-ray structurant, The present invention relates to a one-paste type root canal filler composition which hardens in a root canal. The root canal curable composition according to the present invention, which does not harden in the sealed container but fills into the root canal and then hardens by reacting with body fluid or intramedullary fluid invading from apical and dentinal tubules It has excellent tissue affinity, low degradation rate of cured product, and high performance as a root canal filling material.

That is, the present invention comprises α-tricalcium phosphate and / or tetracalcium phosphate excellent in tissue affinity as a main component, and is a water-soluble organic acid derived from a living body, such as citric acid, malonic acid, malic acid, and maleic acid. Acid, and a homopolymer of acrylic acid, a copolymer of acrylic acid and itaconic acid and polyhydric alcohols such as glycerin, ethylene glycol and propylene glycol as wetting agents, and barium sulfate or bismuth subcarbonate as an X-ray contrast agent The present invention relates to a one-part curable sizing agent root canal filler composition.

The components of the paste in the one-pack curable sizing root canal filling material of the present invention are as follows: α-tricalcium phosphate and / or tetracalcium phosphate 30 to 50% by weight, based on the total weight of the paste; It is preferable to use 6 to 15% by weight, 20 to 30% by weight of a polyhydric alcohol, and 15 to 25% by weight of an X-ray contrast agent.

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

(Examples 1 to 7) Other components were added to α-tricalcium phosphate and / or tetracalcium phosphate powder confirmed by X-ray diffraction, as shown in Table 1.
The mixture was blended at the ratio shown in Table 1 to form a paste. After sealing in a syringe and storing for 30 days, the composition is poured out from the syringe,
The flow rate, curing time and disintegration rate were measured according to ISO-6876. The results are shown in Table 1.

The root canal filling composition of the present invention is a root canal filling composition which conforms to the ISO standard and has extremely excellent dental science and engineering properties, and can contribute to dental treatment.

Claims (4)

(57) [Claims] A root canal filling composition comprising α-tricalcium phosphate and / or tetracalcium phosphate powder, a water-soluble organic acid, a water-soluble polyhydric alcohol and an X-ray contrast agent. 2. The homopolymer of citric acid, malonic acid, malic acid, maleic acid and acrylic acid, wherein the water-soluble organic acid is
The root canal filling composition according to claim 1, wherein the composition is at least one organic acid selected from the group of copolymers of acrylic acid and itaconic acid. 3. The root canal filler according to claim 1, wherein said water-soluble polyhydric alcohol is at least one polyhydric alcohol selected from the group consisting of glycerin, ethylene glycol and propylene glycol. Composition. 4. The root canal filler composition according to claim 1, wherein said X-ray contrast agent is barium sulfate and / or bismuth subcarbonate.