I will never go back to Dr. Michael Klass again. I needed to get one of my teeth re-sealed. This is a treatment that should have no pain, no numbing, and no drilling. So why when I left my perfectly good dentist to see Dr. Klass, did he do all the above and not only that, I cannot and have not been able to bite down on my left side of my mouth for over 2 months now. Ive had my teeth sealed and ive never been in so much pain during the procedure then when I went to Dr. Klass's office. I am returning to my old dentist and will remain there since clearly I should have never left to begin with!