I had a root canal several months ago and the tooth still hurts.  What could be causing the pain if the nerve is gone?

When a tooth has had a root canal and it still hurts, several possibilities exist. If the tooth only hurts when you are biting down or chewing, the tooth may be hitting the opposing tooth too hard. A simple adjustment to the tooth should completely resolve the problem. It is also possible the tooth could have a vertical fracture that was undetected during root canal treatment. If this is the case, the tooth may need to be extracted or have endodontic surgery. Another possibility could be that a nerve or portion of the nerve could still be present. If this is the case, it is possible to save the tooth by redoing the procedure. Have your dentist evaluate the problem and give you more specific recommendations.