Application of Self-etching Primer on 4-META/MMA-TBB Resin

Effect on the Adhesion to Enamel

Abstract

In this study, the effectiveness of self-etching primer treatment on the adhesion between Superbond C&B, which is a 4-META/MMA-TBB resin, and enamel was investigated.
As commercially available self-etching primers, Σprimer, Megabond primer and Macbond primer were used. The tensile bond strengths between Superbond C&B and bovine enamel treated with each self-etching primer was measured after 1 day immersion at 37°C water. The bond strengths by self-etching primer treatment were very high, and were almost same as those obtained by phosphoric acid etching. SEM observation revealed that the degree of decalcification of enamel by self-etching primer treatment is weaker than that by phosphoric acid etching. There was no clear relationship between the tensile bond strengths and degree of decalcification or degree of resin tags formation. It was suggested that another factor, besides anchorage factor, contribute the bond strength of Superbond C&B to enamel.