Dental composite resin material with low polymerization shrinkage rate

Abstract

The invention relates to a dental composite resin material with a low polymerization shrinkage rate, which belongs to the technical field of composite resin materials for repairing or remaking tooth. The dental composite resin material is formed in a mode that a composite resin monomer mixture is mixed with inorganic filler. The composite resin monomer mixture consists of a macro monomer, an acrylate monomer with a vinyl as an end group, an acrylate monomer containing two double bonds and an initiator. The macro monomer is an aromatic polyester low polymer with two or three double bonds. In the invention, the macro monomer is added into the composite resin material; and the macro monomer has the characteristics of low viscosity, high molecular weight and the like, so that the using amount of the inorganic filler can be increased and the polymerization shrinkage rate can be reduced, and thus, the edge micro leakage caused by volume shrinkage in the polymerization process of the materials is reduced and the occurrence probability of secondary caries is reduced.

Description

Technical field: [0001] The invention relates to a composite resin material containing a macromolecular monomer and having a low polymerization shrinkage rate for tooth restoration or reconstruction. 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 and photochromic diagnostic function, which is 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 polymerization and t...

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.

[0010] 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

And require a very high conversion rate, otherwise the performance of the product is poor

[0011] 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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