The etched metal/composite resin interface

This study examined the interface between composite resin and two electrolytically etched alloys using different etching times. A new technique allowed this interface to be tested under both tensile and shear loading. The resultant surface morphology of the etched metal was also examined. There was a very large difference in the bond strengths and surface morphologies between the alloys. The bond strength results indicate the sensitivity of this interface to alterations in etching time, and this is also shown in the resultant surface morphology. The clinical significance of these findings is discussed and clinical recommendations made.