title: Effect of light intensity for adhesives on shear bond strength to dentin.
abstract: This study evaluated the effect of light intensity on the shear bond strength (SBS) of two self-etch adhesive systems: SI-R20401 (an experimental two-step) and Fluoro Bond Shake One (a commercial one-step bonding system). The adhesive systems were applied to the flat dentin surfaces of extracted human teeth according to manufacturers' instructions. Light intensities used for the adhesive systems were 100, 300, and 500 mW/cm2. A resin composite paste was placed and polymerized for 40 seconds with 600 mW/cm2 of light intensity after each bonding procedure. Specimens were subjected to SBS test with a 1.0 mm/minute crosshead speed. Data were statistically analyzed using ANOVA, followed by Bonferroni post hoc test. Two-way ANOVA showed no significant differences in the effects of the adhesive system, light intensity for appliedadhesive, and the interaction between them. Based on the results and limitations of this study, it was concluded that light intensity showed no significant effects on the SBS of the two self-etch adhesive systems.
authors.affiliation: Department of Operative Dentistry, School of Dentistry, Niigata, The Nippon Dental University, 1-8 Hamaura-cho, Niigata, 951-8580, Japan. shinkaik@ngt.ndu.ac.jp
authors.forename: Koichi
authors.initials: K
authors.lastname: Shinkai
authors.forename: Shiro
authors.initials: S
authors.lastname: Suzuki
authors.forename: Yoshiroh
authors.initials: Y
authors.lastname: Katoh
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry / Q000528:radiation effects; D003188:Composite Resins / Q000737:chemistry / Q000528:radiation effects; D055117:Curing Lights, Dental; D003804:Dentin / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000737:chemistry / Q000528:radiation effects*; D004867:Equipment Design; D006801:Humans; D008027:Light; D055115:Light-Curing of Dental Adhesives / Q000379:methods*; D008422:Materials Testing; D055668:Photochemical Processes; D033081:Shear Strength; D013314:Stress, Mechanical; D013997:Time Factors
chemical_list: C470433:Beautifil composite resin; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C503681:FL-BOND S-1; D017438:Bisphenol A-Glycidyl Methacrylate