Preparation method of dental resin material based on principle of inorganic and organic hybrid modification

Abstract

The invention relates to a preparation method of a dental resin material based on the principle of inorganic and organic hybrid modification, belonging to the field of preparation in medicine and dentistry. The invention aims at solving the problem that the existing dental composite resin material used for filling tooth cavities is poor in wear resistance, strength and toughness. The method comprises the following steps of: utilizing a silane coupling agent to carry out surface modification on nano inorganic powder, evenly mixing the modified nano inorganic powder with the materials of relevant monomer, a diluting agent, a photoinitiator, a coinitiator and the like under the light resistant condition; and removing bubbles under vacuum condition. The key points of the invention are as follows: the nano inorganic powder contains sheet alumina particles accounting for 10 to 80 percent of self weight percentage; and the sheet width of the sheet alumina particles is between 0.3micron and 36.0micron and the ratio of the sheet width and the sheet thickness is between 3 and 40. The added sheet alumina particles are beneficial to improving wear resistance and toughness of the material.

Description

technical field [0001] The invention relates to a method for preparing a dental resin material based on the principle of inorganic and organic hybrid modification, and belongs to the field of A61K medical and dental preparations. Background technique [0002] The prevalence of dental caries in developed countries, especially in underdeveloped countries, is still high. Dental composite resin is widely used in the restoration and filling of caries because of its high mechanical strength, thermal expansion coefficient similar to that of teeth, good polishing performance, insoluble in saliva, and color similar to teeth. However, the wear resistance of dental composite resins is not ideal yet. [0003] Dental composite resin, also known as dental composite resin, is a dental restoration material composed of an organic resin matrix, surface-treated inorganic fillers, and an initiating system. It is widely used in direct and indirect repairs of various tooth defects. repair. For...

AI Technical Summary

Problems solved by technology

[0005] Among the components of dental composite resins, the inorganic fillers added to increase strength and wear resistance are mostly amorphous particles, which can play a role similar to spherical particles in composite resins. Dental composites after polymerization and curing The surface layer of the resin, the bonding surface between the amorphous particles and the resin matrix is ​​small, the anchoring force is thus weak, and it is easy to peel off during the friction process. This factor makes the amorphous particles play an important role in improving the wear resistance of dental composite resins. On the other hand, in the body of the dental composite resin after curing, the morphology of the amorphous particles is roughly approximate to a spherical shape, and the contribution to the strengthening and toughening of the dental composite resin is also due to insufficient consideration of the pull-out enhancement. There are some deficiencies in the toughness mechanism

[0006] In order to make full use of the pull-out toughening mechanism to strengthen dental composite resins, in recent years, glass fibers with high aspect ratios, silicon carbide whiskers, silicon nitride whiskers, and aluminum borate whiskers have been considered as inorganic materials. Fillers have attracted the attention of some researchers. Undoubtedly, if this type of inorganic filler with a high aspect ratio can be uniformly mixed into the resin, it will provide a positive benefit to the strengthening and toughening of dental composite resins. However, the long-diameter Glass fibers with high ratio, silicon carbide whiskers, silicon nitride whiskers, and aluminum borate whiskers are difficult to mix evenly into the resin matrix due to their inherent physical shape. In other words, uniform mixing becomes an insurmountable Obstacles, this factor makes the application of inorganic materials such as glass fibers with high aspect ratio, silicon carbide whiskers, silicon nitride whiskers and aluminum borate whiskers in dental composite resins not fully and comprehensively displayed. , this is especially evident in the field of dental composite resin materials for caries filling