Push-out strength of translucent fibre posts cemented using a dual-curing technique or a light-curing self-adhering material.

Autor: Giachetti, L., Scaminaci Russo, D., Baldini, M., Bertini, F., Steier, L., Ferrari, M.
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Zdroj: International Endodontic Journal; Mar2012, Vol. 45 Issue 3, p249-256, 8p, 2 Black and White Photographs, 2 Diagrams, 2 Charts
Abstrakt: Giachetti L, Scaminaci Russo D, Baldini M, Bertini F, Steier L, Ferrari M. Push-out strength of translucent fibre posts cemented using a dual-curing technique or a light-curing self-adhering material. International Endodontic Journal, 45, 249-256, 2012. Abstract Aim To compare by means of a push-out test the interfacial strength of a dual-curing resin cement and a light-curing self-adhering resin composite when used in translucent fibre post cementation. Methodology Thirty-four extracted human premolars with single canals were selected and root filled. Translucent fibre posts (RelyX Fiber Post) were luted into the root canal using two resinous luting systems ( n = 17). Dual-Curing Technique (DC): the specimens were treated with Excite DSC and RelyX ARC, which were light-cured simultaneously through the post for 60 s. Light-Curing Self-Adhering Technique (LCSA): the specimens were treated with Vertise Flow, which was light-cured through the post for 60 s. The specimens were sectioned transversally into six slices to perform the push-out test at the coronal, middle and apical regions of the root canals. Data were analysed by two-way anova. All specimens were analysed by stereomicroscopy and SEM to determine fracture patterns. Results There were no significant differences between the DC and LCSA techniques ( P = 0.703) in any of the canal regions. Root region was not a significant factor for push-out values ( P = 0.255) and group-region interactions were not significant ( P = 0.740). For the DC technique, the majority of the fracture patterns (73.3%) were adhesive at the interface between dual-curing resin cement and adhesive. For the LCSA technique, the majority of the fracture patterns (71.7%) were adhesive at the interface between light-curing self-adhering resin composite and dentine. Conclusions The interfacial strength between light-curing self-adhering resin composite and root canal walls is equivalent to the interfacial strength between dual-curing cement and root canal walls. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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