title: Influence of light intensity on surface-free energy and dentin bond strength of single-step self-etch adhesives.
abstract: In this study, we investigated the influence of light intensity on the surface-free energy and dentin bond strength of single-step selfetch adhesives. The adhesives were applied to the dentin surfaces of bovine mandibular incisors and cured with light intensities of 0 (no irradiation), 200, 400, and 600 mW/cm(2). Surface-free energies were determined by measuring the contact angles of three test liquids placed on the cured adhesives. Dentin bond strengths of the specimens were also measured. Polymerization with a higher light intensity resulted in a lower surface-free energy of the cured adhesives. The greatest bond strength was achieved when a light intensity of 400 mW/cm(2) or greater was used. Our data suggest that the surface-free energy and dentin bond strength of single-step self-etch adhesives are affected by light intensity of the curing unit.
authors.affiliation: Department of Operative Dentistry, Nihon University School of Dentistry.
authors.forename: Kie
authors.initials: K
authors.lastname: Nojiri
authors.forename: Akimasa
authors.initials: A
authors.lastname: Tsujimoto
authors.forename: Takayuki
authors.initials: T
authors.lastname: Suzuki
authors.forename: Syo
authors.initials: S
authors.lastname: Shibasaki
authors.forename: Saki
authors.initials: S
authors.lastname: Matsuyoshi
authors.forename: Toshiki
authors.initials: T
authors.lastname: Takamizawa
authors.forename: Masashi
authors.initials: M
authors.lastname: Miyazaki
mesh_terms: D000818:Animals; D002417:Cattle; D001840:Dental Bonding / Q000379:methods*; D003804:Dentin / Q000737:chemistry* / Q000528:radiation effects*; D017220:Dentin-Bonding Agents / Q000737:chemistry* / Q000528:radiation effects*; D007180:Incisor / Q000737:chemistry; D008027:Light; D008422:Materials Testing; D033081:Shear Strength; D013499:Surface Properties
chemical_list: D017220:Dentin-Bonding Agents