Unreacted Methacrylate Groups on the Surfaces of Composite Resins

Abstract

The unreacted methacrylate groups on the surface of conventional composites and microfilled composites were studied by means of multiple internal reflection infrared spectroscopy. The influences of polymerization time, temperature, and the effect of polishing were studied. We also attempted to relate the results of some mechanical tests to the degree of chemical unsaturation measured in the different resins. All surface treatments and manipulative variables caused a decrease in double bond content and interfacial bond strength.