An ex vivo comparison of bond strength measured by the push-out test between AH Plus and Endosequence BC sealer Hiflow

Endodontic obturation is fundamental to treatment success, with the bond strength of sealer cements to dentin being a crucial parameter for evaluating their effectiveness. Aim: To evaluate the bond strength between root canal dentin walls and the obturation materials AH Plus and Endosequence BC Sealer HiFlow using the push-out test. Material and Method: Twenty single-rooted mandibular premolars were divided into two groups (n=10) according to the sealer used: Group AH (AH Plus Sealer) and Group HF (Endosequence BC Sealer HiFlow). The canals were instrumented with Wave One Gold Large, using 20 mL of 2.5% sodium hypochlorite as irrigation solution. The teeth were cut into 1 mm thick slices in the cervical and middle third regions to perform the push-out test. The failure mode was observed under a stereomicroscope at 40x magnification. The results were subjected to Tukey’s test and ANOVA with a 5% significance level. Results: In the push-out bond strength test, there was no statistically significant difference between AH Plus and Endosequence BC Sealer HiFlow cements (p=0.1952). Similarly, the failure modes showed no significant difference between the cements, in both the cervical and middle thirds (p=0.5703). Conclusion: AH Plus and Endosequence BC Sealer HiFlow demonstrated similar behavior in terms of bond strength and failure mode in root canal dentin walls.