Comparative evaluation of shear bond strength of a bioactive material to composite resin using three different universal bonding agents: An in vitro study

Background: Calcium silicate-based cements or bioceramics have revolutionized and simplified pulp-capping procedures due to its versatility and accessibility. Aim: This study aimed to assess the shear bond strength (SBS) of a bioceramic material to composite resin at two aging periods and with three universal adhesives. Materials and Methods: Forty-eight samples of Biodentine with a height of 2 mm and internal diameter of 4 mm were prepared. After 12 min of mixing, 24 samples were randomly selected and divided into four subgroups: Group I: Single Bond Universal, Group II: Palfique Universal Bond, Group III: G-Premio BOND, and Group IV: Control. Composite resin was restored over Biodentine after the application of universal adhesives using a cylindrical plastic mold of 2 mm height and 2 mm internal diameter. This process was repeated 24 h after mixing on the remaining 24 samples of Biodentine. The universal testing machine was used to measure the SBS of the fractured specimens, followed by stereomicroscopic evaluation. One-way ANOVA test and Bonferroni post hoc test were used to statistically analyze the data. Results: Highest SBS values were observed in Group III at 12 min and 24 h of the setting of Biodentine. Conclusions: Compared to the 12-min group, SBS was higher at 24 h. Group III exhibited higher bond strength than other subgroups.