Push-out bond strength of Calcium hydroxide and Mineral Trioxide Aggregate based sealers to root canal dentin

摘要

Purpose: The adhesiveness of six root canal sealers: Acroseal, Endo CPM, Epiphany, White MTA, Sealapex and Sealer 26 to dentin, was evaluated in a push-out test design. Methods: Twenty eight roots of freshly extracted teeth were gauged with a size 5 Largo drill. With a cutting machine slices of 2 mm were prepared, rinsed with 5.25% NaOCl and a final rinse with 17% EDTA, dried and filled with one of the sealers. After setting their bond strength was measured in a mechanical testing machine. The data were statistically analyzed by using a One Way ANOVA and post hoc Tukey test. Results: The mean and standard deviation from values of bond strength was: Sealapex 2.2 ± 0.4; Endo CPM 3.8 ± 1.3; White MTA 6.0 ± 1.4; Epiphany 10.9 ± 2.6; Sealer 26 12.3 ± 2.3; and Acroseal 12.2 ± 1.4. Acroseal, Sealer 26 and Epiphany presented a significantly (p 0.01) greater bond strength compared with the other sealers. Also White MTA showed higher adhesiveness compared with Endo CPM and Sealapex (p 0.01). Conclusion: The bond strength between endodontic sealers and root dentin was maximal when Acroseal, Sealer 26 and Epiphany were used; Sealapex e Endo CPM, in turn, presented the lowest bond strength mean values.