title: Influence of different pre-etching times on fatigue strength of self-etch adhesives to dentin.
abstract: The purpose of this study was to use shear bond strength (SBS) and shear fatigue strength (SFS) testing to determine the influence on dentin bonding of phosphoric acid pre-etching times before the application of self-etch adhesives. Two single-step self-etch universal adhesives [Prime & Bond Elect (EL) and Scotchbond Universal (SU)], a conventional single-step self-etch adhesive [G-aenial Bond (GB)], and a two-step self-etch adhesive [OptiBond XTR (OX)] were used. The SBS and SFS values were obtained with phosphoric acid pre-etching times of 3, 10, or 15 s before application of the adhesives, and for a control without pre-etching. For groups with 3 s of pre-etching, SU and EL showed higher SBS values than control groups. No significant difference was observed for GB among the 3 s, 10 s, and control groups, but the 15 s pre-etching group showed significantly lower SBS and SFS values than the control group. No significant difference was found for OX among the pre-etching groups. Reducing phosphoric acid pre-etching time can minimize the adverse effect on dentin bonding durability for the conventional self-etch adhesives. Furthermore, a short phosphoric acid pre-etching time enhances the dentin bonding performance of universal adhesives.
authors.affiliation: Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan.
authors.forename: Toshiki
authors.initials: T
authors.lastname: Takamizawa
authors.affiliation: Department of General Dentistry, Creighton University School of Dentistry, Omaha, NE, USA.
authors.forename: Wayne W
authors.initials: WW
authors.lastname: Barkmeier
authors.affiliation: Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan.
authors.forename: Akimasa
authors.initials: A
authors.lastname: Tsujimoto
authors.affiliation: Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Suzuki
authors.affiliation: Department of Diagnostic Sciences, Creighton University School of Dentistry, Omaha, NE, USA.
authors.forename: Donal D
authors.initials: DD
authors.lastname: Scheidel
authors.affiliation: Department of General Dentistry, Creighton University School of Dentistry, Omaha, NE, USA.
authors.forename: Robert L
authors.initials: RL
authors.lastname: Erickson
authors.affiliation: Department of General Dentistry, Creighton University School of Dentistry, Omaha, NE, USA.
authors.forename: Mark A
authors.initials: MA
authors.lastname: Latta
authors.affiliation: Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan.
authors.forename: Masashi
authors.initials: M
authors.lastname: Miyazaki
mesh_terms: D000134:Acid Etching, Dental; D000269:Adhesives; D003188:Composite Resins; D001840:Dental Bonding; D003743:Dental Enamel; D003799:Dental Stress Analysis; D003804:Dentin; D017220:Dentin-Bonding Agents; D006801:Humans; D008422:Materials Testing; D010756:Phosphoric Acids; D019279:Resin Cements; D033081:Shear Strength
chemical_list: D000269:Adhesives; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D010756:Phosphoric Acids; D019279:Resin Cements
keywords: dentin bond durability; pre-etching time; self-etch adhesive; shear bond strength; shear fatigue strength