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Int J Periodontics Restorative Dent ; 38(5): 711­717, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29244885

RESUMO

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.


Assuntos
Resinas Epóxi/uso terapêutico , Técnica para Retentor Intrarradicular , Cimentos de Resina/uso terapêutico , Materiais Restauradores do Canal Radicular/uso terapêutico , Obturação do Canal Radicular , Animais , Bis-Fenol A-Glicidil Metacrilato/uso terapêutico , Bovinos , Colagem Dentária/métodos , Técnicas In Vitro , Polietilenoglicóis/uso terapêutico , Ácidos Polimetacrílicos/uso terapêutico , Preparo de Canal Radicular/métodos , Fatores de Tempo
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