Comparing the Shear Bond Strength of Six Adhesive Systems to Enamel of Primary Teeth

Abstract

Aim and goals: The aim of this study was to evaluate and compare the shear bond strength of six adhesive systems to enamel of primary teeth.Method: This experimental in vitro study was performed on 72 extracted primary molars. The teeth were randomly divided into six groups. In each group one of the adhesives; Tetric N-Bond, AdheSE, AdheSE One F, Single Bond 2, SE Bond, and Adper Prompt L-Pop, were used. After preparing the flat enamel surfaces on buccal or lingual and applying adhesives, composite was adhered to the surfaces and after 24 hours storage and thermocycling (500 cycles, 5-500˚C), shear bond strength was tested with a universal testing machine and mode of failure was evaluated by a stereomicroscope. Data was analyzed by SPSS18 using Anova, tukey and fisher's exact test. P<0.05 was considered as the level of significance.Results: The shear bond strength of Teric N-Bond was significantly higher than SE Bond (P=0.012), AdheSE (P=0.000), AdheSE One F(p=0.001) and Adper Prompt L-Pop(P=0.001). Shear bond strength of Single Bond 2 was significantly higher than AdheSE(P=0.004), AdheSE One F(P=0.006) and Adper Prompt L-Pop (P=0.006). Mode of failure in all groups was mostly adhesive.Conclusion: The shear bond strength of etch-and-rinse adhesive systems were higher than self-etch adhesives except for one adhesive (SE bond) and the bond strength of self-etch adhesives were not significantly different.