At-home, in-office and combined dental bleaching techniques using hydrogen peroxide: Randomized clinical trial evaluation of effectiveness, clinical parameters and enamel mineral content.

Abstract

All the dental bleaching techniques proved equally effective in promoting tooth color change. These techniques may reduce calcium and phosphorous content in enamel. The at-home and the combined techniques may cause greater dental sensitivity than the in-office technique, and led to a higher prevalence of gingival irritation.