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.
In-office bleaching with a two- and seven-day intervals between clinical sessions: A randomized clinical trial on tooth sensitivity.