What is the matching degree of bonding performance between zirconia block and tooth enamel

The bonding performance of zirconia and enamel is a complex and critical problem, which is directly related to the success rate and durability of dental restoration. The following is a detailed analysis of the matching degree of bonding properties between zirconia blocks and tooth enamel:

First, the bonding performance of zirconia block and tooth enamel

As a kind of high performance ceramic material, zirconia block has a wide application prospect in oral restoration. However, due to its chemical inertness and surface properties, the bonding properties of zirconia blocks with tooth enamel are relatively poor. The bonding strength of untreated zirconia is almost zero and remains low even when treated with silane or hydrofluoric acid. This is mainly because zirconia surface contains very little silicate, glass phase is very little, it is difficult to form an effective chemical combination with tooth enamel.

Second, the method of improving bonding performance

To improve the bonding properties of zirconia blocks to tooth enamel, researchers and clinicians have employed a variety of methods, including but not limited to:

Surface treatment:

Sandblasting: By spraying alumina particles to improve the surface roughness of zirconia, increase the mechanical retention force. Sandblasting is a widely used conventional technique in clinical practice, but it is necessary to control sandblasting parameters (such as pressure, Angle, distance and time) to avoid damage to zirconia.

Coating treatment: such as sol-gel coating treatment, a uniform nanoparticle structure can be formed on the surface of zirconia, improving surface roughness and wettability, thus enhancing the bonding strength with tooth enamel.

Use special adhesives:

Phosphate monomer MDP: At present, MDP is the most used and most effective in clinical practice. MDP can form a stable chemical bond with zirconia through ionic or hydrogen bonding, which effectively improves the immediate bonding strength.

Self-etching resin adhesives: Compared with total etching adhesives, self-etching resin adhesives are simple to operate and do not require independent etching steps, so they are more widely used in clinical practice.

Other methods:

Ultraviolet irradiation: it can enhance the hydrophilicity and cell adhesion ability of the surface of zirconia material, thereby indirectly improving the bonding performance.

Laser treatment: The use of laser high energy characteristics of zirconia surface treatment, can increase the surface roughness and wettability, improve bonding strength.

Third, the evaluation of bonding performance matching degree

The evaluation of bonding performance match is usually performed by laboratory testing and clinical follow-up. Laboratory tests mainly include shear strength test, micro tensile strength test, etc., to quantify the bonding properties. Clinical follow-up reflects the actual effect of adhesive performance by evaluating the retention rate, success rate, patient satisfaction and other indicators.

Fourth, Conclusion

In general, the matching degree of bonding properties between zirconia blocks and tooth enamel can be significantly improved by various methods. However, due to the complexity of the oral environment and the existence of individual differences, the actual effect of bonding performance may vary from individual to individual. Therefore, in clinical application, doctors need to choose the appropriate bonding protocol according to the specific situation of the patient, and conduct adequate preoperative evaluation and postoperative follow-up to ensure the success rate and durability of the repair.

Conclusion: Although the bonding performance of zirconia block and enamel is relatively poor, it can be significantly improved by proper surface treatment and use of special adhesives. In clinical application, doctors need to choose the appropriate bonding program according to the specific conditions of patients, and carry out adequate preoperative evaluation and postoperative follow-up.