Assessment of micro-shear bond strength of a self-etch adhesive system to enamel

الملخص EN

Aim: the aim of this study was to evaluate the micro-shear bond strength of three bonding ap-proaches to enamel namely, two-step etch and rinse bonding approach, one step self-etch bond-ing approach, and one step self-etch bonding approach with pre-etching.

Materials and Methods: Ninety sound human permanent molars were used in this study.

The teeth were divided into three main groups according to the type of bonding approaches (n=30).

The teeth were embedded in acrylic block, the buccal surface was grounded to expose flat enamel and to receive two compo-site rods.

Specimens were kept in distilled water (37°C for 24h), and submitted to micro-shear testing.

Results: The micro-shear bond strength of the etch and rinse bonding approach was the highest whereas the self-etch bonding approach was the lowest and there was a significant dif-ference between the three groups.

Conclusions: Etch and rinse-bonding approach is the most pre-dictable technique for bonding of resin composite to enamel, Pre- etching step of enamel plays a positive critical role in improving the bond strength of self-etch bonding approach to enamel.