title: Effect of peroxide bleaches on resin-enamel bonds.
abstract: Human third molar teeth were divided into three groups: untreated control; enamel treated with 35% hydrogen peroxide for 2 hours; and enamel treated with 10% carbamide peroxide gel for 14 days. All teeth were ground to present a flat enamel surface, to which cylinders of light-cured composite resin were bonded. Shear bond strengths were determined for each specimen. The mean shear bond strengths of resin-enamel bonds after pretreatment with both 35% hydrogen peroxide and 10% carbamide peroxide were significantly lower than those for untreated controls. External bleaching with these materials prior to resin bonding procedures may reduce the quality of resin-enamel bonds.
authors.affiliation: Department of Restorative Dentistry, University of Otago, School of Dentistry, Dunedin, New Zealand.
authors.forename: A N
authors.initials: AN
authors.lastname: Stokes
authors.forename: J A
authors.initials: JA
authors.lastname: Hood
authors.forename: D
authors.initials: D
authors.lastname: Dhariwal
authors.forename: K
authors.initials: K
authors.lastname: Patel
mesh_terms: D000179:Acrylates / Q000737:chemistry*; D000704:Analysis of Variance; D000077463:Carbamide Peroxide; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003743:Dental Enamel / Q000187:drug effects; D003799:Dental Stress Analysis; D004338:Drug Combinations; D006801:Humans; D006861:Hydrogen Peroxide / Q000008:administration & dosage / Q000737:chemistry / Q000494:pharmacology*; D010545:Peroxides / Q000008:administration & dosage / Q000737:chemistry / Q000494:pharmacology*; D013718:Tensile Strength; D014073:Tooth Bleaching / Q000009:adverse effects*; D014508:Urea / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000737:chemistry / Q000494:pharmacology
chemical_list: D000179:Acrylates; D003188:Composite Resins; D004338:Drug Combinations; D010545:Peroxides; D000077463:Carbamide Peroxide; C040415:heliobond; D014508:Urea; D006861:Hydrogen Peroxide