Does the pain last all day, or is it only when chewing or sensitive to hot and cold. I had problems after Amalgam removal, mine was from a tooth I got an onlay for. After months of OPing, nothing changed. They altered the bite, etc, still problems. About a month ago I went back and they put some kind of desensitizer on there, and it worked pretty well for me. I'm not sure what the stuff was, maybe I can find my bill and see what it was called.