Dr. Lenkowitz performed two needed, well I think they were needed, root canals for me and then informed me that I still had 4 cavities that needed to be filled. I felt some suspicion about the cavities and so went to two other dentists for a second opinion. I didn't tell the new dentists anything about the "cavities" and both of them told me, after xrays and an exam, that my teeth were perfect. This was over ten years ago and I haven't had a cavity filled yet!