Preparation method of dental composite resin material with low polymerization shrinkage

Abstract

The preparation method of the dental composite resin material with low polymerization shrinkage of the present invention belongs to the technical field of tooth restoration materials. The material components are acrylate monomers, fillers, and initiators; the method is divided into two steps: the preparation of composite fillers and the preparation of composite resin materials; the first step is to add nano-silica powder to the dispersion medium for pre-dispersion, and add other fillers; Mix the ester monomer-initiator mixture, evaporate the dispersion medium, light-cure, and pulverize to obtain a composite filler; the second step is to add the composite filler to the dispersion medium for pre-dispersion; add the remaining acrylate monomer-initiator mixture and stir , mixing, and evaporating the dispersion medium to obtain a dental composite resin material; the mass ratio of the acrylate monomer-initiator mixture used in the two steps is 65-85:15-35. The two-step pre-coating method can significantly reduce the polymerization shrinkage of the dental composite resin material; the pre-dispersion of the filler and the composite filler makes it uniformly dispersed in the monomer.

Description

Technical field: [0001] The invention belongs to the technical field of tooth restoration materials, and in particular relates to a dental composite resin material with low polymerization shrinkage and a preparation method thereof. Background technique: [0002] The composite material made of resin and inorganic filler is not only similar to real teeth in terms of strength, hardness, wear resistance, polishing, color, etc., but also can be endowed with fluorine release function, photochromic diagnostic function, similar to real teeth Various functions such as light transmission and scattering properties are increasingly widely used in tooth repair and reconstruction. It is foreseeable that due to the comprehensive advantages in aesthetics and performance, resin composite materials will completely replace traditional inorganic and metal materials. [0003] There is an Achilles' heel in the resin composite material itself, that is, the volume shrinkage of the material during p...

AI Technical Summary

Problems solved by technology

Due to many problems such as high water absorption value, toxicity, and poor compatibility with other adhesives, this type of system has not been industrialized.

[0007] 3M has developed a class of epoxy resin monomers, which have lower polymerization shrinkage and polymerization stress, and have been proven to be feasible, but the overall performance still cannot exceed the usual methacrylate composite resin

[0008] The latest type of new low-shrinkage monomer is (Thio-Ene), but its application is limited due to its toxicity and odor, and it is still in the research and development stage.

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