Tensile Bond Strength of Four Adhesive Systems

Abstract

Introduction: The continuous appearance of new restorative materials, especially from the composite resins class, and the developmen t of the correspondent adhesive systems has brought major changes about the way in which caviti es are being prepared. Thus, a big part of the restorative therapy in modern dentistry is based on the composite resins adhesion to the hard dental tissues, achieved through adhesive systems. The pur pose of the present study was to evaluate the adhesion strength to the dentin of four commercial adhesive systems. Experimental: Twenty primary, caries-free and without previous restorations, mola rs and premolars were used in the study. For testin g we used three total-etch adhesives and a self-etch one. In order to obtain standard samples, a Teflon ® mould was designed and manufactured, which helped us to apply the same resin volume on the same dentin surface for all the teeth used in this test. Results: Statistical analysis was completed using one- way ANOVA, Tukey and Bonferroni tests. Significantly differences were observed between Point4 ® /Optibond SoloPlus ® and the rest of the samples, the former achieving higher values. Conclusions: The self-etch adhesive system did not match the per formances of the total-etch adhesives, at least not in this study.