Abstract
The current study was performed to analyse the shear bond strength of resin composite of bioactive restorative materials (Activa) using mechanical and chemical surface treatments. A total of 60 bioactive composite discs were prepared using a putty index mould and further divided into 6 groups (n= 10) each undergoing different surface treatment procedures. Study groups included, a control group (Group 1-no ageing, no surface treatments), Group 2- Aged non treated, Group 3- Acid etch/adhesive, Group 4- Acid etch-Silane/adhesive, Group 5- Grinding and Group 6 Grinding-Silane adhesive. All Activa discs were tested for shear bond strength using universal testing machine. Ten samples from each group were assessed for modes of failure. Data was assessed using analysis of variance and Tukey multiple comparisons test. In addition, among the mechanical and chemical surface treatment employed the highest mean value was of group 6 (20.86 (+/- 2.41) and least value of group 3 13.47 (+/- 2.23). Among all groups the most common type of observed failure was adhesive followed by the admixed type. ANOVA displayed a significant difference between types of surface treatments on SBS of the repaired material (p<0.01) thus testifying the hypothesis. To increase surface energy for bonding of Bioactive (Activa) material, mechanical and chemical surface treatments are a prerequisite. A combination of mechanical grinding and silane adhesive (chemical) surface treatments produced desirable outcomes.