Went here for removing mercury fillings from from 2 teeth on bottom and 2 on top. One tooth was cracked on top and an onlay was placed. Left there and numbness never left part of my lip and my cheek remained swollen like a chipmunk. Also pain in the right side of my head going up to my temple. Dr. Singer was not concerned, he was off at a conference and had me see a friend who couldn't help either. I started seeing a plethora of specialists to find answers, ENT, neurologist, oral surgeon, another dentist. I even went back to Singer to give him a chance to try to figure what went wrong. I figured, he should at least take a look since he did the work. I was in and out in no time. He just stared blankly when I said I had pain in my head. He finally gave me his take. Sometimes anesthesia can cause numbness, although very rare. He did not address the onlay, chance of infection or swelling. His answer for swelling was sometimes a hematoma forms and causes swelling but is should go away. Give it time. So I finally decided to see an endodontist after speaking to my long time dentist in CA. He finally listened to me and my suspicion all along. I had an infection under the tooth Singer worked on and abcess and infection was affecting my