Teens should not: Teens should not need whitening. That said, one's general dentist can recommend various whitening methods for teeth. There are over-the-counter teeth whiteners that are not as strong as the ones used at a dental office. Crest 3D whitening strips work fine, with a first course being 20 days. The course and the time one leaves the strips on her teeth vary depending on teeth sensitivity, etc...
Answered 9/28/2019
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