Push-out bond strengths: the Epiphany-Resilon endodontic obturation system compared with different pairings of Epiphany, Resilon, AH Plus and gutta-percha

Aim To assess the bond strength of the new resin‐based Epiphany–Resilon root canal filling system, and to compare this with bond strengths of different pairings of AH Plus, gutta‐percha, Epiphany and Resilon. Methodology A total of 65 extracted human single‐rooted teeth were used. All teeth were instrumented using a set of ProTaper rotary instruments. Irrigation was performed with 15 mL of 1.25% NaOCl between each instrument and the smear layer was removed during and after instrumentation with 5 mL of 17% EDTA. The canal spaces were filled with different combinations of core and sealer using lateral condensation, as follows: group 1, AH Plus + gutta‐percha; group 2, AH Plus + Resilon; group 3, Epiphany + Resilon; group 4, Epiphany + gutta‐percha; group 5 (control), gutta‐percha only. Cylinders of root dentine 1.13 (0.06)‐mm long were prepared from the coronal sections of the 65 teeth. The test specimens were subjected to the push‐out test method. After adhesion testing, the remaining sections were examined under a stereomicroscope at × 25 magnification to determine the nature of bond failure. The values of bond strength were analyzed by one‐way analysis of variance (anova) and the post hoc Tukey's test, with significance set at P