Tensile and Shear Bond Strengths of Adhesive Resin Cements

Abstract

In this study we evaluated the tensile and shear bond strengths to the tooth structure using one experimental and four commercially available resin cements.In addition, the interfaces between the cements and dehtin, and the failure patterns after debonding were observed under the SEM.The tensile and shear bond strengths of the cements to enamel were significantly higher than those to dentin except for MASA Bond.Comparison of the tensile and shear bond strengths for all cements revealed that the shear bond strengths to enamel, as well as that of MASA Bond to dentin, were significantly higher than the tensile bond strengths.The SEM observations showed that the resin cements employed in this study formed a hybrid layer of different thicknesses.Furthermore, comparison of the tensile and shear specimens often revealed a different failure morphology.