Tensile bond strength of one bottle and self-etching adhesive systems on dentin

Abstract

The purpose of this study was to assess, in vitro, the tensile bond strength to dentin of the following adhesive systems: Single Bond (3M), Excite (Vivadent), Prompt L- Pop (ESPE) e Optibond Solo Plus (Kerr). Thirty third molars, extrac- ted according to therapeutic indi- cation, were used. The roots were removed at the cement-enamel junction level and the crowns sec- tioned in a mesio-distal direction. The dental portions were included in self-cured acrylic resin, abraded on a bathe under water spray and polished to 400 and 600 grit. The adhesive systems were applied on dentin according to manufactu- rers’ instructions and resin-based composite (Z250) cones were bonded. For each adhesive system, 15 spe- cimens were prepared, stored in distilled water at 37o C during 24 h and submitted to tensile bond strength tests on a universal tes- ting machine (EMIC DL-2000) at a crosshead speed of 0.5 mm/minute. The statistical analysis (ANOVA and Tukey’s test, p<0.01) showed that the highest mean (23.71 MPa) was for Optibond Solo Plus, and the tensile bond strength of Single Bond (17.16 MPa), Excite (18.19 MPa) and Prompt L-Pop (17.56 MPa) were statistically similar. Key words: dentin, adhesive, smear layer, composite resin, hy- bridization.