Laser vs visible-light cured composite resin: an in vitro shear bond study.

This study was conducted to compare the shear bond strength of composite resin to enamel surface, etched by 37% phosphoric acid for 30 and 60 sec respectively, after achieving the polymerization of composite resin by a conventional visible-light and argon laser curing system in permanent and primary teeth. Results demonstrated higher shear bond strength with laser polymerization exposed for 10 sec compared to conventional visible-light exposed for 40 sec polymerization. This increased bond strength was statistically significant in primary teeth, whereas, in permanent teeth it was insignificant. The different etching times used in the present study showed no statistically significant difference in bond strengths for either of the curing systems.