Applied to secondary impression room temperature addition silicone rubber ultra-light oral impression material

Abstract

The invention discloses a room-temperature addition silicone rubber ultra-light dental impression material for secondary impression, which is a two-component material, wherein the two components include a matrix component and a catalysis component; the matrix component consists of vinyl silicone oil containing two vinyl groups, hydrogen-containing silicone oil with three or more Si-H groups, a compatibilizer, a reinforcing agent, an inhibitor and the like; the catalysis component consists of polysiloxane containing two vinyl groupss, a compatibilizer, a reinforcing agent, a hydrophilic modifier, a platinum catalyst and the like. The material disclosed by the invention is simple to operate, and the process is simple and convenient; the material meets the requirements in terms of curing time, elastic recovery, tear strength, Shore hardness, tiny duplication and the like; the permanent hydrophilicity of the impression material is improved, the volume shrinkage of the impression material is reduced, the dimensional stability of the material is improved, the duplication accuracy of the material is high, and the tiny duplication of the impression is clear.

Description

technical field [0001] The invention belongs to the field of medical materials and relates to oral impression materials. Background technique [0002] Impression materials are the materials used to make oral impression films in oral clinical treatment and restoration. At present, alginate-based impression materials, agar-based impression materials, and polysulfide rubber impression materials are commonly used clinically in my country. However, pure alginate impression materials cannot meet the performance requirements of impression materials, and relevant auxiliary materials must be added. The gel of agar-based impression materials is very brittle and difficult to resist the stress when the impression is taken out. Polysulfide rubber impression The disadvantage of the mold material is that the texture is soft, the permanent deformation is relatively large, and the hardening is slow. If the time is insufficient, the impression is easily deformed. The addition-type silicone r...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an ultra-light oral cavity impression material applied to the secondary impression room temperature addition of silicone rubber to overcome the shortcomings of traditional impression materials such as poor hydrophilicity, easy shrinkage, and poor dimensional stability. This material has Good elasticity, toughness and strength, and good fluidity, high plasticity, small volume shrinkage, high replication accuracy, good chemical stability, good hydrophilicity, simple operation and easy demoulding, etc.

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