Weak?: Bleaching is generally safe, however you do not want to bleach teeth with decay or severe decalcification. See your dentist for a check up and then continue with the bleaching. Remember crowns and fillings will not bleach.
Answered 10/12/2013
5.5k views
Don't know: What you mean by "weak teeth". If the teeth have severe bone loss, gum disease, decay, etc., then probably not a good idea to use whitestrips or any bleaching method. Would recommend consulting with a dentist to determine what bleaching option would be best for you.
Answered 11/3/2012
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