Shear bond strengths of two dentin bonding agents with two desensitizers: An in vitro study

AIM: The aim of this in vitro study was to compare the shear bond strengths of two different dentin bonding agents with two different desensitizers. MATERIALS AND METHODS: Eighty molars were taken which were ground to expose the dentin. The teeth were divided into two major groups. Each major group was subdivided into four subgroups of 10 samples each. Groups Ia and IIa were treated as dry bonding groups, groups Ib and IIb were treated as a moist bonding groups, groups Ic and IIc were rewetted with Gluma desensitizer, and groups Id and IId were rewetted with vivasens desensitizer. Major group I was treated with Gluma comfort bond and Charisma. Major group II was treated Prime and Bond NT and TPH. The samples were thermo cycled and shear bond test was performed using an Instron machine. The data were analyzed using one-way analysis of variance and Tukey's Honestly significant different test. RESULTS: The results revealed that the specimens rewetted with Gluma desensitizer showed the highest shear bond strength compared to all other groups, irrespective of the bonding agent or composite resin used. CONCLUSIONS: It can be concluded that rewetting with desensitizer provided better bond strength than the other groups.