title: Influence of endodontic irrigants on resin sealer bond strength to radicular dentin.
abstract: The present study evaluated the influence of 2% chlorhexidine and 2.5% sodium hypochlorite on the resin sealer/dentin interface bond strength of AH Plus/gutta-percha and Epiphany/Resilon. Seventy-two extracted bovine incisors were randomly distributed into 6 groups according to irrigant and sealers: G(S+AH)=physiologic saline solution+AH Plus/gutta-percha; G(S+Ep)=physiologic saline solution+Epiphany/Resilon; G(H+AH)=2.5% sodium hypochlorite (NaOCl)+AH Plus/gutta-percha; G(H+Ep)=2.5% NaOCl+Epiphany/Resilon; G(C+AH)=2% chlorhexidine (CHX)+AH Plus/gutta-percha; and G(C+Ep)=2% CHX+Epiphany/Resilon. After 7 days at 37°C and 100% humidity, the roots were cut transversally on the long axis of the tooth in 0.8 mm (±0.09)-thick slices; these slices were then subjected to the push-out test. Data were analyzed using a 2-way ANOVA and Tukey tests at 5% significance. The AH Plus/gutta-percha groups showed significantly higher bond strength than the Epiphany/Resilon groups, regardless of the irrigant used (p<0.001). Sodium hypochlorite adversely affected bond strength in the AH Plus group, whereas chlorhexidine did not influence the push-out bond strength of either sealer (p<0.05). Two percent chlorhexidine did not adversely affect the bond strength of the sealers, whereas 2.5% sodium hypochlorite solution damaged AH Plus/gutta-percha bond strength.
authors.affiliation: Department of Conservative Dentistry, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
authors.forename: Aline Wunderlich
authors.initials: AW
authors.lastname: Rocha
authors.forename: Cíntia Dickel
authors.initials: CD
authors.lastname: de Andrade
authors.forename: Vicente Castelo Branco
authors.initials: VC
authors.lastname: Leitune
authors.forename: Fabrício Mezzomo
authors.initials: FM
authors.lastname: Collares
authors.forename: Susana Maria Werner
authors.initials: SM
authors.lastname: Samuel
authors.forename: Fabiana Soares
authors.initials: FS
authors.lastname: Grecca
authors.forename: José Antônio Poli
authors.initials: JA
authors.lastname: de Figueiredo
authors.forename: Regis Burmeister
authors.initials: RB
authors.lastname: dos Santos
mesh_terms: D000268:Adhesiveness; D000704:Analysis of Variance; D000818:Animals; D002417:Cattle; D002710:Chlorhexidine / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods*; D003799:Dental Stress Analysis; D003804:Dentin / Q000737:chemistry; D004853:Epoxy Resins / Q000737:chemistry*; D006171:Gutta-Percha / Q000737:chemistry*; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012388:Root Canal Irrigants / Q000737:chemistry*; D012389:Root Canal Obturation / Q000379:methods; D018915:Root Canal Preparation / Q000379:methods; D012973:Sodium Hypochlorite / Q000737:chemistry*; D014092:Tooth Root / Q000601:surgery
chemical_list: D004853:Epoxy Resins; D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; D006171:Gutta-Percha; D012973:Sodium Hypochlorite; D002710:Chlorhexidine