title: Influence of previous acid etching on dentin bond strength of self-etch adhesives.
abstract: The purpose of this study was to investigate the effect of previous phosphoric acid etching on the dentin bond strength of single-step self-etch adhesive systems. Facial surfaces of bovine teeth were wet ground with #600 SiC paper. Adhesives were applied with and without previous phosphoric acid etching, and light irradiated. Resin composite was bonded to the adherend surface, followed by light irradiation and storage in water at 37 degrees C. Four groups (n = 10) were made per adhesive system: with and without previous acid etching and with and without thermal cycling between 5 degrees C and 55 degrees C for 10,000 cycles. Specimens were tested in a shear mode at a crosshead speed of 1.0 mm/min. Two-way ANOVA and Tukey HSD test at a level of 0.05 were performed. The changes in dentin bond strengths were different among the adhesive systems tested. In all experimental conditions of this study, the dentin bond strength decreased or remained unchanged with previous acid etching. From the results of this study, previous acid etching might not be acceptable for increasing dentin bond strength of the single-step self-etch adhesive systems.
authors.affiliation: Department of Operative Dentistry, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan.
authors.forename: Masahiko
authors.initials: M
authors.lastname: Ikeda
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Kurokawa
authors.forename: Noriatsu
authors.initials: N
authors.lastname: Sunada
authors.forename: Yukie
authors.initials: Y
authors.lastname: Tamura
authors.forename: Masayuki
authors.initials: M
authors.lastname: Takimoto
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Murayama
authors.forename: Susumu
authors.initials: S
authors.lastname: Ando
authors.forename: Masashi
authors.initials: M
authors.lastname: Miyazaki
mesh_terms: D000134:Acid Etching, Dental; D000818:Animals; D002417:Cattle; D003188:Composite Resins; D003799:Dental Stress Analysis; D003804:Dentin / Q000187:drug effects*; D017220:Dentin-Bonding Agents; D055115:Light-Curing of Dental Adhesives; D008422:Materials Testing; D010756:Phosphoric Acids / Q000494:pharmacology; D019279:Resin Cements; D033081:Shear Strength; D016369:Smear Layer
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; D010756:Phosphoric Acids; D019279:Resin Cements; C030242:phosphoric acid