Hey my front tooth got chipped and it started hurting when I bite on it and it was somewhat sensitive to cold drinks. I went to the dentist and got a filling done on it about 3 weeks afterwards. The tooth was back to normal...Alas only for 2 days when I started getting a constant tooth ache and it also hurt on tapping the tooth. After 3 days of pain I went to the emergency dentist and she took an X-ray and said that nothing wrong can be seen in the x ray and the filling is far away from the root, perhaps the tooth was too high and that was causing the pain as I started to eat with it again so she filed it and told be to wait and see if the pain is gone. She said if things don't get better a root canal may be needed. My pain has continued that day after I saw the dentist and on the next day it still hurt constantly just at tolerable level. Even though the pain was much better I got a slight fever and headache which may be unrelated. I don't know how long I'm supposed to wait with this tolerable pain or wait until it becomes intolerable again? Is it true that a root canal may be needed even though nothing besides the pain indicates a problem? PS> This was all done at NYU Dental school so the dentists are not experts in knowing what to do.