A kind of preparation method of low volume shrinkage, antibacterial dental resin composite material

Abstract

The invention discloses a preparation method of a low-volume-shrinkage antibacterial dental resin composite material. The preparation method comprises the following steps: mixing and stirring bifunctional acrylate resin and phosphoryl-containing acrylate resin to obtain a dental resin solution; adding a silver source compound, and mixing uniformly with a photoinitiator after the silver source compound is dissolved; then adding an inorganic filler; and finally, injecting into a mold, and irradiating by adopting blue light or ultraviolet light. According to the preparation method disclosed by the invention, a bisphenol monomer with rigid radicals is adopted to prepare a dental resin monomer to reduce the volume shrinkage during curing of a material, and bidirectional amphipathic molecules containing phosphonyl and unsaturated double-bond functional groups are used as a surface modifying agent to ensure that on the one hand, the interface action between the resin and the inorganic filler is improved, and on the other hand, by virtue of the complexing action between the phosphonyl functional groups and silver ions, the silver source compound is dissolved, the process of releasing nano silver is controlled, and a long-acting antibacterial effect is achieved, so that a dental filling material which has low volume shrinkage, excellent mechanical property and antibacterial effect is prepared.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and relates to a preparation method of a surface-modified dental resin composite material containing inorganic nanometer antibacterial silver with low volume shrinkage. Background technique [0002] Since the invention of light-cured dental resin materials in the 1960s, this type of material has developed rapidly due to its aesthetics, non-toxicity, and ease of use. However, due to volume shrinkage during the polymerization of dental resins, the incidence of secondary caries in patients is high, and the wear resistance and mechanical strength of polymer resins are limited, which greatly limits the service life of dental resin materials. With the deepening of people's understanding of dental materials, it is particularly important to develop a new type of dental resin material with high wear resistance, high mechanical strength and low volume shrinkage. [0003] Most of the methods rep...

AI Technical Summary

Problems solved by technology

First of all, using silver ions as the silver source will have the problem of too fast release speed, which will greatly shorten the validity period of the antibacterial material and affect the antibacterial effect and application orientation of the material.

Secondly, it is difficult to uniformly disperse the silver source in dental materials by using inorganic substances as the silver source loading material, and at the same time, it will weaken the interaction force between the inorganic / resin material and affect the final performance of the material

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