Resumen de Effect of root canal sealer and artificial accelerated aging on fibreglass post bond strength to intraradicular dentin

Fernanda-Ribeiro Santana, Carlos-José Soares, Josemar Martins Ferreira, Andréa-Dolores-Correia-Miranda Valdivi, João-Batista-de Souza, Carlos Estrela

• Objectives: To evaluate the effect of root canal sealers (RCS) and specimen aging on the bond strength of fibre posts to bovine intraradicular dentin.

  Material and Methods: 80 teeth were used according the groups - Sealapextm, Sealer 26®, AH Plus® and speci - mens aging - test with no aging and with aging. The canals prepared were fi lled using one of each RCS. The posts were cemented. Roots were cross-sectioned to obtain two slices of each third. Samples were submitted to push-out test. Failure mode was evaluated under a confocal microscope. The data were analysed by ANOVA, Tukey's, and Dunnet tests (? = 0.05).

  Results: No signi fi cant difference was detected among RCS. Aged control presented higher bond strength than immediate control. The aging did not result significant difference. Adhesive cement-dentin failure was prevalent in all groups.

  Conclusions: RCS interfered negatively with bonding of fibreglass posts cemented with self-adhesive resin cement to intraradicular dentin.