In a recent study, it was shown that bleaching teeth with 10% carbamide peroxide can reduce enamel surface microhardness. It was recommended by the authors to either add professionally administered or self-administered fluoride to remineralize the enamel.
Source: Leandro G et al, Effects of 10% Carbamide Peroxide Treatment and Sodium Fluoride Therapies on Human Enamel Surface Microhardness, General Dentistry, May 2008, Vol 56, No 3, pg 274-277.
Hans Skariah, B.Sc., DMD
Promenade Court Dental Health Group in Mississauga
2233 Hurontario St., Mississauga, ON, Canada
(1/2 km north of the QEW in the Dome Building)