Abstract:Objective: To study the effect of different bonding systems and aging treatment on the bonding strength between resin ceramic composites and Dentin. Methods: A new hybrid ceramic restorative material (LavaTM Ultimate excellent toughness porcelain) was used in this study. In the first part of the experiment, the prepared isolated teeth were randomly divided into three groups: a two-step self-etching universal adhesive system, a total acid etching adhesive system (experimental group), and a green giant one-step universal adhesive system. The excellent toughness ceramic block was bonded to the isolated dentin surface. The static fracture strength of each group was measured using a microcomputer controlled electronic universal experimental machine, and the fracture morphology was observed. In the second part of the experiment, the shear specimens of the above three adhesive systems were immersed in three different solutions (cola, soda water, artificial saliva) for 30 days to compare the difference of shear strength between the groups. Results: The shear strength values of the two universal adhesive systems were both significantly higher than that of the total acid etching adhesive system. For resin composite ceramic materials with superior toughness, the shear strength of the one-step universal bonding system was better than that of the two-step self etching universal bonding system. The shear strength of the three bonding systems decreased after acid and alkali immersion aging, but it had little relationship with which solution they were immersed in. Conclusion: The shear strength of the three bonding systems for superior toughness porcelain meets clinical requirements, but the acid base aging treatment can reduce the shear strength of the three bonding methods for superior toughness porcelain.