Assessment of Microshear Bond Strength: Self-Etching Sealant versus Conventional Sealant

Objective: recently, self-etching fissure sealants have been introduced to reduce technical sensitivity; however, their efficacy should be assessed. the aim of this study was to assess of the microshear bond strength of self-etching and conventional fissure sealants.materials and methods: thirty non-carious third molars were randomly divided into three groups (n=10). microcylinders of concise fissure sealant were bonded to pre-pared buccal and lingual surfaces using the two following procedures. in the first group, phosphoric acid was used to prepare the substrate; whereas in group two, con-cise was used in combination with prompt l-pop. in group 3, a self-etching fissure sealant (enamel loc) was utilized per se. after 24 hours, the samples were subjected to 500 rounds of thermocycling and shear bond testing using a microtensile tester ma-chine with a crosshead speed of 0.5mm/min. data were analyzed using one-way re-peated measure anova and bonferroni post hoc tests (spss version 16).results: the mean and standard deviation of microshear bond strength of the groups were as follows: group 1: concise+ etching (14.59 ± 1.19 mpa), group 2: con-cise+prompt l-pop (12.86 ± 1.98 mpa), and group 3: enamel loc (5.59 ± 0.72 mpa). one-way anova revealed that all the differences were significant and the conventional sealant exhibited the highest mean bond strength.conclusion: conventional sealant using phosphoric acid etch application prior to fis-sure sealant application demonstrated more bond strength in comparison with that of self- etch bonding and self- etch sealant.