Abstract
A system which includes a silane coupling agent for activating the surface of SiO2 surface, for repairing fractured porcelain was developed. The inorganic filler in composite resin was mainly composed of SiO2. In this study, we investigated whether the treatment of composite resin with a silane coupler has any effect on the shear bond strength of repaired composite resin. The bond strength between the extracted human enamel treated with the silane coupler and prepared composite was also mearsured. The bond strength of repairing resin to the composite treated with silane coupler was greater than that to the untreated composite, and the same results were obtained with the treated human enamel. These results suggest that the treatment of the composite or human enamel with a silane coupler can effectively increase the bond strength.
