Effect of MTA-based Root Canal Sealer on Resin Bond Strength of Fiber Post

Abstract

Various factors might affect interfacial bonding between fiber post and the dentin. The aim of this in vitro study was to evaluate effects of MTA-based sealer on bond strength of a fiber post cemented with self-adhesive resin cement and compare the results with eugenol-based sealers(Dorifill) and epoxy-based sealers(AH Plus). Materials and Methods: Seventy-two human uniradicular maxillary incisors teeth were decoronated and prepared using the step-back technique and randomly devided into four groups(n=18 for each group):group 1, control group (gutta-percha points only, no sealer); group 2, AH Plus sealer; group 3, Dorifill sealer; and group 4, MTA fillapex sealer. The roots were obturated with gutta-percha using the cold lateral compaction technique. Fiber posts were cemented into the prepared post spaces with self-adhesive resin cement. All teeth were sectioned transversally into 2-mm-thick discs. These discs were then subjected to the push-out. The data were then analyzed by using one-way ANOVA and post hoc Tukey's test at = 0.05 . Results: Mean ( SD) bond strength in root canals: Gcontrol(8.811.57), GDorifill(4.020.93), GAH Plus(6.211.16), GMTA fillapex(6.841.50). One-way analysis of variance (ANOVA) revealed that sealers have significant effects on bond strength (p<0.05). Conclusion: The results of this study showed that the type of canal sealer affect the bond strength of a fiber post cemented with resin cement