Originally Posted by JK98
Often when a root canaled tooth hurts, it is an infection of the gum, and not the tooth itself. If all the nerves in the tooth were removed, I can't see how the tooth itself could hurt. I guess if a root canal is done improperly, some of the nerve remains.

I have had root canals redone because of infection and they still hurt and had to be extracted. I did not have gum problems associated with these teeth . You make an interesting point that teeth that have had their nerves removed should not have anything left to get infected , but many of us have had root canaled teeth get infected for some reason.There might be organic matter left even after the nerve is removed that attracts bacteria.