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Volume 38 , Issue 5
September/October 2018
Pages 711–717

Effect of Fiber Post Cementation Timing on the Bond Strength of Resin Cements in Epoxy Resin–Obturated Canals

Luiza Salles Alves Berti, DDS/Leandro Augusto Pinto Pereira, DDS, MS/Vanessa Galego Arias Pecorari, DDS, MS, PHD/Flávia Lucisano Botelho Amaral, DDS, MS, PhD/Cecília Pedroso Turssi, DDS, MS, PhD/Roberta Tarkany Basting, DDS, MS, PhD/Fabiana Mantovani Gomes França, DDS, MS, PhD

PMID: 29244885
DOI: 10.11607/prd.2649

This study evaluated the influence of timing after endodontic treatment and type of resin cement used on the bond strength of fiber posts to epoxy resin–obturated canals. A total of 80 bovine incisor roots were divided into four groups (n = 20). Glass fiber posts were cemented at two different times, immediately or 7 days after endodontic treatment, using either a dual-curing resin cement (RelyX ARC, 3M ESPE) or a self-adhesive resin cement (RelyX U200, 3M ESPE). Following post cementation, the samples were cross-sectioned into slices containing root dentin, cement, and fiber post at the cervical, mid, and apical root thirds. The push-out test was performed on a universal testing machine. Three-way analysis of variance for randomized blocks showed no significant effect within the triple interaction (P = .394) or between the double interactions cement-timing (P = .395), cement-root thirds (P = .996), and timing-root thirds (P = .331). The main factor cement revealed a significant effect, showing that regardless of the timing and root third, RelyX ARC provided significantly higher bond strength values than U200. Regardless of root third and timing, the dual-curing resin cement showed higher bond strength to root dentin when the canals were filled with epoxy resin–based cement.

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