I think Dr. Greenstein is unprofessional and not fully competent. A co-worker recommended Dr. Greenstein. Since he was close to where I worked I started seeing him in 1993. Having disclosed my medical history, it increasingly became obvious that he was providing a substand level of care even though my physican indicated my condtion did not warrant any special considerations. My physician even provided lab reports to support his recommendation. Dr. Greenstein once suggested it would not be cost effective to do a bridge bridge work based on his perception of my life expenctancy. As if he were concened about the cost to me. For cleaning, x-rays, and exams, this guy can pull it off adequately. If you have anything thing beyond the basics, well, good luck.