A kind of low-shrinkage nano-composite resin for dental restoration and preparation method thereof

Abstract

The invention discloses a nano-composite resin with low shrinking percentage for dental repair and a preparation method thereof. The composite resin comprises an organic matrix, an initiator system and inorganic filler. The composition resin is characterized by further comprising oligomeric polysilsesquioxane nano particles. The composition comprises the components in percentage by weight as follows: 18-29% of organic matrix, 1-2% of initiator system, 59-78% of inorganic filler and 2-20% of oligomeric polysilsesquioxane nano particles. The preparation method comprises the following steps of: uniformly mixing all the components to obtain un-cured nano composite resin paste; then, vacuumizing to remove bubbles out of the composite resin paste material; and finally, placing into a mould and curing by visible lights to obtain the nano-composite resin with low shrinking percentage for dental repair. Due to addition of POSS (Polysilsesquioxane), the polymerization shrinking percentage of the composite resin is remarkably reduced and the polishing retentivity and the wear-resisting durability of the material are further improved. The composite resin provided by the invention has the advantages that raw materials are low in price, equipment requirement is low, and the preparation process is simple, easy to operate and suitable for industrialized production.

Description

technical field [0001] The invention belongs to the field of preparation of dental restoration materials, in particular to a low-shrinkage nano-composite resin for dental restoration and a preparation method thereof. Background technique [0002] Caries is a progressive lesion of tooth hard tissue caused by a combination of factors in the oral cavity, manifested as the demineralization of inorganic matter and the decomposition of organic matter, and the formation of caries on teeth. It is the most common disease. One of the most common oral diseases, the average dental caries rate is as high as 80%, the key to treatment is the restorative material. Since Bowen synthesized the famous bisphenol A-glycidyl methacrylate (Bis-GMA) in 1962, resin-based dental restorative materials have greatly satisfied the needs due to their advantages such as convenient operation, beautiful color, and superior physical, chemical and biological properties. It has met the requirements of clinicia...

AI Technical Summary

Problems solved by technology

Although dental restorative materials have become the first choice for treatment, the problems of polishing retention, poor wear resistance and secondary caries caused by micro-leakage caused by polymerization shrinkage still need to be further resolved.

[0004] With the development and application of organic synthesis technology, scientific researchers have developed a variety of new organic monomers, such as cyclic polymers, thiol-ene monomer systems and bisphenol A methacrylic monomer derivatives, etc., to make compound The polymerization shrinkage rate of the resin is reduced to about 2%, but some synthetic processes are limited to the laboratory scale, which is difficult to produce on a large scale, and there are biological safety hazards in systems such as thiol-ene monomers, so people pay more attention to the development of inorganic fillers

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