There are no known problems during pregnancy, but patients should probably delay treatment until after delivery. Risks Peroxide and Perborate solutions have been available for many years as an antiseptic in the mouth. They have only more recently been used for their effect on teeth whitening. Research indicates that using peroxide on teeth as instructed is safe. The peroxide should be kept away from the soft tissues of the mouth.
Some patients do feel discomfort in the teeth after whitening procedures.
The discomfort should disappear within 12 hours. If the sensitivity persists for more than 12 hours the patient should contact the practice.