This study aimed to evaluate shear bond strength of mineral trioxide aggregate and biodentine to self-adhering flowable composite. Materials and Methods: eighty Double Split Teflon mold has been prepared with a central hole measuring (3mm in diameter and 2 mm in height) for the mold used for tested materials and (2mm in diameter and in height) for the other mold used for restorative material. The molds were filled with MTA and Biodentine. The mixing material MTA and biodentine applied to its mold (n = 40) and allocated into 2 groups. The specimens will store for
72 hours at 37˚C and 100% humidity. After 72 hours, self-adhering flowable composite was applied over MTA and Biodentine with a height and diameter each of 2 mm. The samples were stored in Incubator for 24 hours at 37˚C to enhance setting and then removed from the mold. SBS was measured in a universal testing machine with a load cell of 5kN and a crosshead speed of 0.5 mm/min. Data were analyzed using Graph Pad Instat. A value of P < 0.05 was thought statistically significant. After homogeneity of variance and normal distribution of errors had been confirmed, student t-test was done for compared pairs. Chi square test was performed for failure mode analysis.
Results: self-adhering flowable composite–Biodentine groups showed non significantly higher SBS values than the group made of self-adhering flowable composite–MTA (P > .05).
Conclusion Biodentine exhibited higher SBS than MTA; therefore, they could be preferred under flowable composites