A study of the match between dental zirconia blocks and enamel

The matching degree between dental zirconia block and enamel is an important research topic in the field of restorative dentistry, and the following is a summary and analysis of the research in this field:

First, the physical properties of dental zirconia block and enamel matching degree

Hardness and modulus

Dental zirconia block has extremely high hardness and modulus, its hardness is more than four times that of human tooth enamel, and its modulus is much higher than that of normal human teeth. This high hardness and modulus allows zirconia blocks to withstand large occlusal forces in restorative dentistry, but also poses certain challenges in terms of wear on the maxillary and neighboring teeth.

Wear properties

Studies have shown that despite the high hardness of zirconia blocks, the wear of both zirconia blocks and enamel is relatively low when mated with natural enamel in a simulated oral environment. This is attributed to the good fracture toughness and surface roughness management of zirconia blocks. However, care still needs to be taken to avoid excessive wear in patients with high occlusal forces or poor occlusal relationships.

Second, dental zirconia blocks and enamel bonding performance match

Bond strength

The bond strength between zirconia blocks and enamel is affected by a variety of factors, including the surface treatment of zirconia blocks, the choice of bonding agent and bonding technology. The bond strength of zirconia blocks to enamel can be significantly improved by appropriate surface treatment (e.g., sandblasting, coating coupling agent, etc.) and selection of suitable bonding agents (e.g., self-etching resin bonding agent).

Bonding durability

Bonding durability is an important index for evaluating bonding performance. Long-term clinical observation shows that the bonding of properly treated zirconia blocks with enamel has good durability and can meet the long-term needs of oral restoration.

Third, dental zirconia block and enamel matching improvement method

Material modification

In order to improve the match between zirconia blocks and tooth enamel, researchers have developed a new zirconia-resin biomimetic composite denture material whose hardness, strength and modulus are perfectly matched with normal human teeth by combining zirconia ceramics and biocompatible resins through compositional compositing and tissue structure biomimetic design. This new material not only retains the excellent properties of zirconia ceramics, but also improves the match with tooth enamel.

Optimized surface treatment

By optimizing the surface treatment process of zirconia blocks, such as using sol-gel coating technology, a uniform nanoporous structure can be formed on the surface of zirconia blocks to improve the surface roughness and wettability, thus enhancing the bonding strength with tooth enamel.

Fourth, conclusion

The match between dental zirconia blocks and enamel is an important research topic in the field of restorative dentistry. Although zirconia blocks are characterized by high hardness and high modulus, their matching degree with enamel can be significantly improved by material modification and surface treatment optimization to meet the long-term needs of dental restoration. Meanwhile, when selecting and applying zirconia blocks, clinicians and technicians should fully consider the patient's occlusal force, occlusal relationship, and other factors to develop a reasonable restorative program to obtain the best restorative results.

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