A double blind randomized clinical trial of at-home tooth bleaching using two carbamide peroxide concentrations: 6-month follow-up.
Effect of different bleaching protocols on whitening efficiency and enamel superficial microhardness.
Efficacy and Safety of 10% and 16% Carbamide Peroxide Tooth-whitening Gels: A Randomized Clinical Trial
Tooth sensitivity and bleaching effectiveness associated with use of a calcium-containing in-office bleaching gel.