Study on the matching degree of dental zirconia block and tooth enamel

The matching degree of dental zirconia block and tooth enamel is an important research topic in the field of dental prosthesis. The following is the summary and analysis of the research in this field:

First, the matching degree of physical properties between dental zirconia blocks and tooth enamel

Hardness and modulus

Dental zirconia blocks have extremely high hardness and modulus, their hardness is more than 4 times that of human tooth enamel, and the modulus is also much higher than that of normal human teeth. This high hardness and high modulus make zirconia blocks able to withstand a large bite force in oral restoration, but at the same time, it also brings certain challenges, namely, the wear problem of jaw teeth and adjacent teeth.

Wear performance

Studies have shown that although zirconia blocks have high hardness, both zirconia blocks and enamel wear are relatively low when paired with natural enamel under simulated oral environment. This is due to the good fracture toughness and surface roughness management of zirconia blocks. However, for patients with high occlusal force or poor occlusal relationship, attention should still be paid to avoid excessive wear.

Second, dental zirconia block and tooth enamel bonding performance matching degree

Bond strength

The bonding strength between zirconia block and enamel is affected by many factors, including the surface treatment of zirconia block, the choice of adhesive and the bonding technology. By proper surface treatment (such as sandblasting, coating coupling agent, etc.) and selection of suitable adhesive (such as self-etching resin adhesive), the bonding strength between zirconia block and tooth enamel can be significantly improved.

Bond durability

Adhesive durability is an important index to evaluate adhesive properties. Long-term clinical observation shows that the bonding of properly treated zirconia blocks with tooth enamel has good durability and can meet the long-term needs of oral restoration.

Third, the matching degree improvement method of dental zirconia block and tooth enamel

Material modification

In order to improve the matching degree of zirconia block and tooth enamel, the researchers combined zirconia ceramic and biocompatible resin through the composition of composite and tissue structure imitation biochemical design, and developed a new zirconia-resin bionic composite denture material whose hardness, strength and modulus are fully matched with normal human teeth. This new material not only retains the excellent properties of zirconia ceramics, but also improves the matching degree with tooth enamel.

Surface treatment optimization

By optimizing the surface treatment process of zirconia block, such as adopting sol-gel coating technology, a uniform nanoparticle structure can be formed on the surface of zirconia block, and the surface roughness and wettability can be improved, so as to enhance the bonding strength with tooth enamel.

Fourth, Conclusion

The matching degree of dental zirconia block and tooth enamel is an important research topic in the field of dental prosthesis. Although zirconia block has the characteristics of high hardness and high modulus, the matching degree between zirconia block and tooth enamel can be significantly improved through material modification and surface treatment optimization, so as to meet the long-term needs of oral restoration. At the same time, clinicians and technicians in the selection and application of zirconia blocks, should fully consider the patient's occlusal strength, occlusal relationship and other factors, to develop a reasonable repair program, in order to obtain the best repair effect.