See an Endodontist: A crack in a tooth is a pathway for bacteria to infect the root canal system. If this exists and your dentist put a crown over it the pathway for drainage has been closed and is trying to find a new way out. The swelling and pain may represent that process. The swollen gland may also represent a current infection. Call your local endodontist for an exam to identify the problem.
Answered 7/8/2013
5.4k views
Follow Up: I recommend returning to your dentist for follow-up to rule out infection in addition your other complaints.
Answered 3/26/2013
5.4k views
Infection: Sounds like an infection. See a dentist immediately.
Answered 3/12/2013
5.3k views
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