Push-out bond strength and SEM analysis of two self-adhesive resin cements: An in vitro study

Abstract Purpose The retentive strength of two self-adhesive resin cements used for the cementation of fiber posts into root canals filled with methacrylate-based sealer and core material (Resilon) was evaluated using the thin-slices push-out test on human molars. Materials and methods RelyX Fiber Posts #3 (3M ESPE, Seefeld, Germany) were luted with RelyX U200 (3M ESPE) ( n  = 10) and Maxcem Elite (Kerr Corporation, Orange, CA, USA) ( n  = 10). Mean values of push-out bond strength for each group and root region (cervical, middle and apical) were calculated. Data were statistically analyzed with one-way ANOVA and Tukey's test (P  Results Without being statistically significant, the bond strength of RelyX was higher (8.23 ± 4.46 MPa) when compared to that of Maxcem Elite (6.52 ± 3.68 MPa). Conclusions Significant differences (P  60%) adhesive failures at the resin cement-dentine interface were observed.