An In-Vitro Assessment of Micro-Shear Bond Strength of a Nano Adhesive to Dentin with Different types of Composite Restorative Systems

Abstract

Objective: The present study evaluated the micro-shear bond strength of a nano adhesive to dentin with different types of composite restorative systems. Materials and method: Thirty caries-free, freshly extracted human molar teeth were sliced to expose dentin. The dentin slices were randomly divided into three main groups (10 each) and bonding was done at three sites so as to create total 90 samples with 30 in each group. Group A: nanofilled Composite, Group B: Tetric EvoCeram Bulk fill and Group C: Sonic Fill Bulk fills composite. Adhesive (nano bond) was used for bonding in all the groups. After 24 hours of immersion in water at 37°C, then subjected to thermocycling, a micro-shear bond test was carried out. One way analysis of variance (ANOVA) and Tukey’s tests were used for testing the significance between the means of tested groups (P value ≤ 0.05). Result: The mean micro-shear bond strength values for Groups A, B, C were 10.4, 13.85 and 17.16 MPa respectively. Conclusion: Sonic Fill Bulk fills composite and nano bond displayed the highest micro-shear bond strength to dentin.