Evaluation of Different Adhesive Systems on Dentin Bond Strength

The objective of this paper was to compare the in vitro effect of a conventional and three self-etching adhesive systems as regards bond strength to human dentin substrate by means of the microtensile test. A total of eight sound third molars were used. The teeth had their roots embedded in acrylic resin and underwent removal of the occusal enamel and abrasion of dentin surface. Then, specimens were divided as two teeth into each group according to the adhesive system to be assessed: G1: Adper Single Bond 2 (3M/ESPE), G2: Clearfil SE Bond (Kuraray), G3: Adper SE Plus (3M/ESPE), and G4: Adper Easy One SE (3M/ESPE). The tooth bottom was sectioned perpendicularly to its long axis so we had “stick-like” specimens to be subsequently subjected to the microtensile test. Data were submitted to the analysis of variance (ANOVA) test and multiple comparison of Tukey, with a significance level of 5%. The bond strength means were: G1: 36.54 (±13.57), G2: 37.46 (±19.04), G3: 26.07 (±9.77) and G4: 19.66 (±7.09), with statistical significant differences between groups (p< 0.05). The adhesive systems Adper Single Bond 2 and Clearfil SE Bond showed in vitro similar behavior, and performance higher than that of Adper SE Plus and Adper Easy One.