Bond strength of composite resin to enamel bleached with carbamide peroxide.
Bleaching with 35 percent hydrogen peroxide causes enamel surface changes, which result in lower bond strengths of composite resin. Although a previous SEM study showed that home bleaching with 10 percent carbamide peroxide does not cause such surface changes, the results of our study indicate that carbamide peroxide bleaching reduces the shear bond strength of composite to etched enamel. Removal of surface enamel, however, restores bond strengths to normal levels.
Cvitko
E
E
Department of Operative Dentistry, The University of Iowa, Iowa City.
Denehy
G E
GE
Swift
E J
EJ
Pires
J A
JA
D000134:Acid Etching, Dental; D000077463:Carbamide Peroxide; D003188:Composite Resins; D001840:Dental Bonding; D003743:Dental Enamel / Q000187:drug effects*; D004338:Drug Combinations; D006801:Humans; D008422:Materials Testing; D010545:Peroxides / Q000009:adverse effects*; D013718:Tensile Strength; D014073:Tooth Bleaching / Q000009:adverse effects*; D014508:Urea / Q000009:adverse effects / Q000031:analogs & derivatives*
D003188:Composite Resins; D004338:Drug Combinations; D010545:Peroxides; D000077463:Carbamide Peroxide; D014508:Urea