I had my teeth cleaned by Debbie and then reviewed by Dr. Rewwer. I had yellowed teeth from coffee which are sensitive to hot and cold. the advice given was to that they could whiten them but that Crest White strips are just about as good for sensitive teeth. Also, i was given a packet of new toothbrush, floss, and Sensodyne tooth paste for the hot/cold issue-it works!!!! Sensodyne also acts on cavity prevention which is my goal.