Evaluation of bond efficacy of an experimental all-in-one adhesive system SSB-200

Abstract

This study was aimed to evaluate the bonding efficacy of an experimental all-in-one adhesive system SSB-200 by measurement of microtensile bond strength to dentin and also by ultra-structural observation of the bonding interface under FE-SEM and TEM. Bond strength to dentin, 49.17±9.07 MPa and 65.34±13.67 MPa for two diff erent types of resin composites, was comparative to that with 2-step self-etching primer systems. FE-SEM observation revealed the tight adhesion to enamel, sound dentin and caries-affected dentin. In TEM figures, a thin hybrid layer, less than 0.5μm in thickness, was found between the bonding resin layer and dentin. Also, there was no voids formation along the bonding interface. These finding suggested that a bond mechanism in nano-level could be involved in the adhesion to dentin. From the results obtained, a good bond efficacy of SSB-200 might be promising for the clinical use.