title: Analysis of adhesive interface in root canals irradiated by Er,Cr:YSGG laser after luting a fiber post.
abstract: This study evaluated the effect of Er,Cr:YSGG laser on the root canal dentin after luting a fiber post. Twenty-four bovine teeth roots were prepared using NiTi instruments and filled with Sealer 26 and gutta-percha. Post spaces were prepared and roots were distributed according to dentin treatment (n = 8): 2.5%NaOCl (group control), Er,Cr:YSGG laser (1.5 W, 20 Hz, 20 s) (group test 1) or 2.5%NaOCl + Er,Cr:YSGG laser (group test 2). Fiber posts were luted using adhesive cement (Rely X U200, 3M) and roots were prepared to confocal laser scanning microscopy (CLSM) and scanning electron microscope (SEM). The morphology of interface, thickness of cement, and the gaps and tags were analyzed. Non-parametrical data for thickness of cement were submitted to Friedman and Kruskall-Wallis tests (α = 0.05) and parametrical data for gaps to ANOVA (α = 0.05). CLSM of the cement thickness and gaps revealed no significant difference in surface treatment (NaOCl, Er,Cr:YSGG laser and NaOCl + Er,Cr:YSGG laser) (p > .05) and canal thirds (cervical, middle, and apical) (p > 0.05). SEM showed tags and a residual layer of cement adhered to dentin, mainly in laser-irradiated specimens. The pretreatment of root canal with Er,Cr:YSGG laser previously to luting the fiber post with a self-adhesive cement did not influence the cement thickness and gaps but affected the dentin interaction.
authors.affiliation: Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, CEP, 14040-904, SP, Brazil.
authors.forename: Aline Evangelista
authors.initials: AE
authors.lastname: Souza-Gabriel
authors.affiliation: Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, CEP, 14040-904, SP, Brazil.
authors.forename: Manoel Damião
authors.initials: MD
authors.lastname: Sousa-Neto
authors.affiliation: Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, CEP, 14040-904, SP, Brazil.
authors.forename: Mirian Saavedra Lopes
authors.initials: MS
authors.lastname: Ururahy
authors.affiliation: Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, CEP, 14040-904, SP, Brazil.
authors.forename: Lilian Mendes
authors.initials: LM
authors.lastname: Andrade
authors.affiliation: Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, CEP, 14040-904, SP, Brazil.
authors.forename: Juliana Jendiroba
authors.initials: JJ
authors.lastname: Faraoni
authors.affiliation: Department of Oral and Maxillofacial Science, "Sapienza" University of Rome, Rome, 0016, Italy.
authors.forename: Umberto
authors.initials: U
authors.lastname: Romeo
authors.affiliation: Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, CEP, 14040-904, SP, Brazil. rgpalma@forp.usp.br.
authors.forename: Regina Guenka
authors.initials: RG
authors.lastname: Palma-Dibb
mesh_terms: D000818:Animals; D002417:Cattle; D003738:Dental Cements / Q000737:chemistry / Q000494:pharmacology; D053844:Lasers, Solid-State; D012390:Root Canal Therapy; D013499:Surface Properties; D014092:Tooth Root / Q000187:drug effects / Q000528:radiation effects
chemical_list: D003738:Dental Cements
keywords: cement thickness; gaps/tags; interface morphology; resin cement