Preparation method of dentistry composite resin material capable of improving abrasion resistance and obdurability

Abstract

The invention relates to a method for preparing a dental composite resin material aiming to improve the wear resistance and the toughness, which belongs to the field of preparations for dentistry. The wear resistance and the toughness of the prior dental composite resin material used for tooth cavity filling need to be further improved, and the proposal devotes to solving the problem. The method of the proposal comprises the following steps that: a silane coupling agent is utilized to perform surface modification on nano-inorganic powder, the modified nano-inorganic powder and materials such as a monomer (such as bisphenol A-glycidyl methacrylate), a diluting agent (such as triethylene-glycol dimethacrylate), a photo initiator (such as camphorquinone), and a coinitiator (such as 2-(dimethylamino)ethyl methacrylate) are mixed evenly under dark conditions, and bubbles are removed under vacuum conditions. The key point of the proposal is that the nano-inorganic powder contains silicon dioxide nano-rods which account for 10 to 80 percent of the weight of the nano-inorganic powder. The silicon dioxide nano-rods added into the material help to improve the wear resistance and the toughness of the material.

Description

technical field [0001] The invention relates to a preparation method of a dental composite resin material aimed at improving wear resistance and toughness, and belongs to the field of A61K medical and dental preparations. Background technique [0002] The progress of dental medical technology depends to a large extent on the technological progress of dental materials; A class of materials that are frequently used and used in large quantities. [0003] The incidence of dental caries with the appearance of caries as a symptom is still at a relatively high numerical level. Whether in developed countries or in underdeveloped countries, the incidence of dental caries is relatively high. Taking my country as an example, my country The per capita caries rate in China is 40%, among which the caries rate is 80% for children, 60-70% for young people, and 52% for old people. Each patient involves 2-3 teeth on average. The above figures show that there is a huge market demand for denta...

AI Technical Summary

Problems solved by technology

[0006] 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 fillers after polymerization and curing In the surface layer of the composite 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. The effect is compromised. 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 not fully taken into account. Toughening mechanism with some deficiencies

[0007] 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