Shear bond strength of Mirage Bond to enamel and dentin

This study determined the shear bond strength of resin composite to bovine enamel etched with Mirage Bond primer containing 2.5% nitric acid. These results were compared with 37% orthophosphoric acid gel. In addition, the bond strength of resin composite to dentin was determined following treatment with the same primer. Resin composite was applied with and without an intermediary unfilled resin, and the specimens were stored for 1 week and then thermocycled prior to testing. The bond strength to enamel was substantially greater than to dentin (P less than 0.001). The results for enamel revealed that there was no significant difference between the etchant regimes (P greater than 0.05) but the intermediary resin significantly improved bond strengths (P less than 0.05). The presence of an intermediary resin also significantly improved the bond strength to dentin (P greater than 0.05).