I had severe sensitivity and pain in a front tooth for a couple of months. I went to the dentist who detected an abscess above the tooth next to it and, thus performed a root canal procedure on it. I was given two courses of antibiotics. However, the pain in my front tooth never went away and so the dentist performed a root canal procedure on that tooth. There was quite a bit of pain from that procedure, of course, but over the next week my sensitivity disappeared and the pain seemed to be subsiding. I had the tooth filled a week later and the pain continued to subside. However, after a week, I developed pretty severe pain whenever the tooth came into contact with anything. So, three weeks now after the procedure, though the sensitivity is gone, I'm still in quite a bit of pain. Needless to say, after months of pain, I'm at my wit's end. Do I need to have the procedure redone or is something else causing this?