Preparation method for dental fortified resin based on the principle of material hybridization modification

Abstract

The invention relates to a preparation method for 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 arranged 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 preparation method of a dental reinforced resin material based on the principle of material hybridization and modification, and belongs to the field of A61K medical and dental preparations. Background technique [0002] The prevalence of caries in developed, especially underdeveloped countries, is still high. The per capita caries rate in my country is 40%, including 80% for children, 60-70% for young people, and 52% for the elderly. Each patient has an average of 2-3 teeth. The large demand for oral dental filling materials indicates that there is a huge market prospect for dental filling materials. Dental composite resin is widely used in the restoration and filling of caries due to its high mechanical strength, thermal expansion coefficient similar to that of teeth, good polishing performance, insoluble in saliva, and similar color to teeth. However, the wear resistance of dental composite resins is not ideal at present....

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 mostly use amorphous particles. The particle outline of amorphous particles is roughly similar to spherical, and the role it can play in composite resins is also similar. For spherical particles, in the surface layer of dental composite resin cured by polymerization reaction, the bonding surface between amorphous particles and resin matrix is ​​small, so the anchoring force is weak, and it is easy to peel off during the friction process. This factor makes no The role of shaped particles in improving the wear resistance of dental composite resins has been compromised. On the other hand, in the body of dental composite resins after curing, the shape of amorphous particles is roughly spherical, which is very important for the dental composite resin. The strengthening contribution is also lacking due to not fully taking into account the pull-out toughening 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