(PR105) Bond Strength Impact of Root Canal Filling with Bioceramic Gutta-Percha Cones

Objective: To evaluate the bond strength (BS) and the failure pattern in teeth filled with epoxy resin and calcium silicate-based sealers associated with bioceramic (GPB) or conventional (GPC) gutta-percha cones. Materials and

Methods: 80 maxillary canines were selected and prepared with WaveOne Gold Large file (45./05) and distributed into eight groups according to the filling material (n=10): G1- GPC+AHPlus, G2- GPC+AHPlus Bioceramic, G3- GPC+BioC Sealer, G4- GPC+BioC Sealer Ion, G5- GPB+AHPlus, G6- GPB+AHPlus Bioceramic, G7- GPB+BioC Sealer, G8- GPB+BioC Sealer Ion. The roots were sectioned and the slices (1 mm) were submitted to the push-out and failure pattern tests. Parametric tests were used for BS statistical analysis (Shapiro-Wilk P<0.05 and Levene test P<0.05). ANOVA was used to evaluate the BS between the root thirds (cervical, middle and apical), endodontic sealer, and gutta-percha cone type (P <0.05).

Results: The results showed higher bond strength for G8 (8.38±4.27) compared to G6 (6.19±3.28), G7 (5.70±3.18), G5 (4.61±2.11), G1 (4.26±2.35), G4 (3.63±2.26), G3 (2.94±2.32) and G2 (1.19±0.89) (P <0.05) with a prevalence of mixed (43.7%) and adhesive to the filling material failures (35.4%).

Conclusion: Calcium silicate-based sealer filled with bioceramic gutta-percha cones showed higher values of bond strength with prevalence of adhesive and mixed failures.