Dental resin composition utilizing reinforcing mechanism with mixed nanometer

Abstract

The invention relates to a method for preparing dental fortified resin based on the principle of material hybridization modification, belonging to the field of medical and dental preparation. The wear-resisting property and the obdurability of the existing composite dental resin used for filling tooth cavities are in urgent need to be improved, and the invention aims at promoting the technological progress of the resin. The method includes the steps: carrying out the operation of surface modification to inorganic nano-sized powder under the utilization of silane coupling agent; uniformly mixing the modified inorganic nano-sized powder with monomer, such as bisphenol A methyl glycidyl acrylate, diluting agent, such as triethylene-glycol dimethacrylate, light trigger, such as camphorquinone, coinitiator, such as dimethylaminoethyl methacrylate, and other materials under photophobic conditions; and eliminating air bubbles under vacuum condition. The invention is characterized in that the interior of the inorganic nano-sized powder contains aluminium oxide nano rods which are 10 to 80 percent of the weight of the inorganic nano-sized powder. The aluminium oxide nano rods added inside contribute to the improvement of the wear-resisting property and the obdurability of the materials.

Description

technical field [0001] The invention relates to a dental resin composition utilizing a nano-doping enhancement mechanism, which belongs to the field of A61K medical and dental preparations. Background technique [0002] For a long time, with the unremitting efforts of medical workers, the incidence of dental caries has dropped significantly. However, dental caries as a widespread disease has not disappeared. According to statistics, no matter in developed countries or in In underdeveloped countries, the incidence of caries has reached a level that cannot be taken lightly. In my country, for example, the per capita caries rate is 40%, among which the caries rate is 80% for children and 60% for young people. ~70%, the caries rate of the elderly is 52%, and each patient involves an average of 2 to 3 teeth. The reality shows that there is a large market demand for dental filling materials for the treatment of caries. Dental composite resin is widely used in the restoration and f...

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