I live in California. A couple of weeks ago my daughter had a cavity filled. After the procedure my daughter's tooth was hurting and they told her this was normal. After a couple of weeks she was still in agonizing pain and returned to the dentist. After xrays and examniation they determined that the dentist drilled too close to the nerve and she now has to have a Root Canal. There was no decay or cracks or anything that would initially warrant a RC. Is it the dentist's fault? Can I sue him?