Root canal filling material containing bioactive glass and preparation method thereof

Abstract

The invention discloses a root canal filling material containing bioactive glass, which comprises the following raw material components: powder and a solvent, and the mass ratio of the powder to the solvent is 1.0-3.0; the powder is prepared from the following raw materials: bioactive glass, an X-ray radiation inhibitor, a thickening agent and / or a bioactive component, wherein the X-ray radiation inhibitor is selected from one or more of ZrO2, Bi2O3 and CHI3; the bioactive glass comprises the following raw material components: at least one of SiO2 and P2O5, and at least one of Na2O, CaO, SrO, MgO, K2O, CaF2, SrF2, LaF3, SrCl2, NaF, CaCl2, KCl, CuO, ZnO, B2O3, H3BO3, CoO and hydrates of the Na2O, CaO, SrO, MgO, K2O, CaF2, SrF2, LaF3, SrCl2, NaF, CaCl2, KCl, CuO, ZnO, B2O3, H3BO3 and CoO.

Description

technical field [0001] The invention belongs to the technical field of oral cavity materials, and in particular relates to a root canal filling material containing bioactive glass and a preparation method thereof. Background technique [0002] Root canal filling material is a material used to fill and seal the pulp cavity and root canal space during root canal treatment. The ideal root canal filling material should have the following properties: (1) easy to fill the root canal; (2) no shrinkage after solidification, impermeable to water, and good sealing; (3) antibacterial; (4) can be stored in the root canal for a long time (5) X-ray opacity; (6) No tooth discoloration; (7) Can be removed from the root canal if necessary. Clinically used root canal filling materials include solid filling materials, root canal sealants, pulp capping agents, and root canal plasticizing fluids. [0003] Root canal sealant is one of the most important materials in root canal filling, which is...

AI Technical Summary

Problems solved by technology

[0005] Zinc oxide clove oil sealant, such as Pulp Canal Sealer, has a certain fluidity and consistency, and is one of the earliest clinical sealants, but it has low strength, weak adhesion to the root canal wall, and a high dissolution rate , free clove oil and zinc oxide, which are inflammatory

[0006] Calcium hydroxide sealant such as Sealapex, the biggest feature is that it can form a highly alkaline environment and exert antibacterial properties, but the cytotoxicity is also relatively high, and its dissolution rate is high, which will affect the sealing effect of the root tip

[0007] Silicone root canal sealers such as Roeko Seal and Gutta Flow have good biocompatibility, but the chemical bonding with the dentin wall is weak, and the bonding force is greatly affected by the residual substances on the root canal wall

[0008] Resin-based root canal sealants mainly include polymethacrylic resin and epoxy resin. The former is Epiphany SE, EndoRez, and the latter is AH Plus. They have a small dissolution rate and strong adhesion to the root canal wall. But the curing time is very long, and the antibacterial property is mainly exerted by releasing formaldehyde and other substances before curing, and it does not have antibacterial property after curing

[0009] Nano-biomaterial-based root canal sealers are a relatively new type of sealant, such as EndoSequence BCSealer and iRoot SP, which bond to the dentin by forming a hydroxyapatite layer, and have good root tip sealability and biocompatibility , antibacterial properties are better than the other types of sealants mentioned above, but they need a humid environment to fully cure, and it is not easy to remove when the root canal is retreated

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