title: Effect of gutta-percha solvents on fiberglass post bond strength to root canal dentin.
abstract: The purpose of this study was to investigate the influence of gutta-percha solvents on the bond strength of fiberglass post to root canal dentin. Forty bovine incisors were decoronated, prepared, filled, and randomly distributed into four groups (n = 10) according to the gutta-percha solvent used: control, xylene, eucalyptol and orange oil. After root canal treatment, the posts were cemented into the prepared root canals using a resin-based cement. A micro push-out test was executed, and the patterns of failure were assessed with microscopy. The data were analyzed using two-way ANOVA followed by Tukey's test. The control group exhibited greater bond strength compared to the eucalyptol group in the cervical and middle thirds of the root (P < 0.05); however, it did not differ significantly from the xylene and orange oil groups (P > 0.05). No difference was observed in the values of the xylene, orange oil, and eucalyptol groups (P > 0.05). The cervical third had higher values than the apical third for all tested solvents (P < 0.05). Adhesive failure between resin cement and dentin was the most frequent type of failure. The use of xylene and orange oil as gutta-percha solvents did not influence the bond strength of fiberglass posts to root canal dentin.
authors.affiliation: Endodontic Division, School of Dentistry, University of Cuiabá
authors.forename: Orlando A
authors.initials: OA
authors.lastname: Guedes
authors.forename: Gustavo S
authors.initials: GS
authors.lastname: Chaves
authors.forename: Ana H G
authors.initials: AH
authors.lastname: Alencar
authors.forename: Alvaro H
authors.initials: AH
authors.lastname: Borges
authors.forename: Cyntia R A
authors.initials: CR
authors.lastname: Estrela
authors.forename: Carlos J
authors.initials: CJ
authors.lastname: Soares
authors.forename: Carlos
authors.initials: C
authors.lastname: Estrela
mesh_terms: D000818:Animals; D002417:Cattle; D003786:Dental Pulp Cavity; D003804:Dentin; D005898:Glass; D006171:Gutta-Percha; D011176:Post and Core Technique; D012997:Solvents
chemical_list: D012997:Solvents; C009753:fiberglass; D006171:Gutta-Percha