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Quintessence International
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Quintessence Int 23 (1992), No. 11     1. Nov. 1992
Quintessence Int 23 (1992), No. 11  (01.11.1992)

Page 769-771


Effect of peroxide bleaches on resin-enamel bonds
Stokes / Hood / Dhariwal / Patel
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 signifcantly lower than those for untreated controls. External bleaching with these materials prior to resin bonding procedures may reduce the quality of resin-enamel bonds.