Purpose: To evaluate the adhesion of AH26 and Epiphany sealers to gutta percha/Resilon surfaces and dentine in the presence or absence of the smear layer.
Methods: Dentine, gutta-percha, and Resilon surfaces were filled with different combinations of AH26 and RealSeal sealers in eight groups: Group 1- Smear (-) dentine, filled with Dentine Bonding Agent and AH26 sealer; Group 2- Smear (+) dentine, AH26; Group 3- Smear (-) dentine, AH26; Group 4- Smear (-) dentine, RealSeal sealer. In the remaning groups, gutta percha and Resilon pellets were used as experimental surfaces to test the sealer adhesion. The samples were attached to a universal testing machine and pulled at 1 mm/s to determine the tensile bond strengths.
Results: Statistical analyses revealed that the smear free dentine filled with AH26 had a significantly higher bond strength than those of the other groups (p<0.05). The presence of the smear layer and dentine bonding agent significantly reduced the adhesion of AH26 to dentine (p<0.05). The bonding of AH26 to Resilon and gutta percha was significantly better than those of the RealSeal sealer (p<0.05).
Conclusion: The tensile bond strength of AH26 sealer to gutta percha/Resilon and dentine was superior to that of RealSeal sealer.