INFLUENCE OF DIFFERENT ENDODONTIC SEALERS ON FIBERGLASS POST ADHESION

Abstract

The aim of this study was to evaluate the influence of different endodontic sealers on fiberglass posts adhesion, using conventional and self-adhesive resin cements. Sixty single-rooted human teeth were selected. Canals were prepared with X1Blue 40.06 (MK Life). Roots were randomly distributed in six groups (n=10) as follows: G1) AH Plus/RelyX ARC; G2) AH Plus/RelyX U200; G3) BioC Sealer/RelyX ARC; G4) BioC Sealer/RelyX U200; G5) Sealer Plus BC/RelyX ARC; G6) Sealer Plus BC/RelyX U200. The roots were perpendicularly sectioned and three slices per root were obtained, each corresponding to a post third (cervical, middle and apical). Push-out test was performed. To analyze the failure pattern, specimens were analyzed under an optical microscope at 10× magnification. Bond strength was calculated and analyzed using ANOVA and Tukey tests with a significance level of 5%. The bond strength values of posts cemented with conventional resin cement (RelyX ARC) or with self-adhesive resin cement (RelyX U200) previously filled with AH Plus were similar (P > 0.05). The lowest bond strength values were observed for the groups in which bioceramic sealers and conventional resin cement were associated (Bio C Sealer/RelyX ARC and Sealer Plus BC/RelyX ARC) (P < 0.05). Adhesive failures between cement and post, and between cement and dentin were predominant (55.3%). Bioceramic sealers negatively influenced the bond strength values of fiber posts cemented with conventional resin cement.