PMID: 11913289Mar 27, 2002Paper

Effect of peroxide concentration and brushing on whitening clinical response

Compendium of Continuing Education in Dentistry
Robert W GerlachX Zhou

Abstract

This clinical trial compared the effects of hydrogen peroxide concentration and toothbrushing on clinical response to vital bleaching. Tooth bleaching was accomplished with a flexible, polyethylene strip coated with a hydrogen peroxide bleaching gel worn for 30 minutes twice daily over a 14-day period. A total of 36 subjects were randomized to 1 of 3 treatment groups: 5.3% hydrogen peroxide strip plus prebrushing, 6.5% hydrogen peroxide strip plus prebrushing, or 6.5% hydrogen peroxide strip without prebrushing. Two groups brushed with regular anticavity toothpaste immediately before bleaching, while the other group performed ad libitum brushing only. Tooth color was measured over a 14-day period using digital images of the anterior dentition. Over the 14-day treatment period, all 3 strip groups experienced highly significant (P < 0.001) whitening as evidenced by decreased yellowness (delta b*) and increased brightness (delta L*), as well as composite color change (delta E*) relative to baseline. Keeping brushing constant, the 6.5% hydrogen peroxide strip plus prebrushing group experienced a 31% to 60% improvement in whitening relative to the 5.3% hydrogen peroxide standard. Keeping concentration constant at 6.5% hydrogen perox...Continue Reading

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