title: Thin and thick layers of resin-based sealer cement bonded to root dentine compared: Adhesive behaviour.
abstract: This study aims to evaluate tensile and shear bond strengths of one epoxy (AH) and two methacrylate resin-based sealers (EZ and RS) in thin and thick layers bonded to root dentine. An alignment device was prepared for accurate positioning of 20 root dentine cylinders in a predefined gap of 0.1 or 1 mm. Sealer was placed in the interface. Bond strength tests were conducted. Mode of failures and representative surfaces were evaluated. Data were analysed using anova and post-hoc tests, with P < 0.05. The thick layer of sealer produced higher bond strength, except for the shear bond strength of EZ. Significant differences between thin and thick layers were found only in tensile bond strengths of AH and RS. Mixed type of failure was constantly found with all sealers. Bond strengths of thick layers of resin-based sealers to root dentine tended to be higher than with thin layers.
authors.affiliation: Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia.
authors.forename: Epita S
authors.initials: ES
authors.lastname: Pane
authors.affiliation: Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia.
authors.forename: Joseph E A
authors.initials: JE
authors.lastname: Palamara
authors.affiliation: Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia.
authors.forename: Harold H
authors.initials: HH
authors.lastname: Messer
mesh_terms: D001840:Dental Bonding; D003738:Dental Cements; D003799:Dental Stress Analysis; D003804:Dentin; D008422:Materials Testing; D019279:Resin Cements; D012387:Root Canal Filling Materials
chemical_list: D003738:Dental Cements; D019279:Resin Cements; D012387:Root Canal Filling Materials
keywords: root canal sealer; shear bond strength; tensile bond strength; thickness