I've been having tooth pain for a while now (a few months, at least). My dentist put a crown on a cracked molar few weeks ago, and we hoped that it would solve the problem, but unfortunately, it didn't. So I finally went in to see a specialist yesterday to determine if I was going to need the dreaded root canal...and, surprise! The problem is not in the cracked-and-crowned molar, it's in the tooth right next to it. I'm clenching & grinding my teeth at night, which is causing that last molar to be very sensitive. He said there's no cracks or other problems that he could see, and that if I faithfully wear my recently-purchased night guard, and avoid chewing on that side, it should go away on its own in about two weeks.
I was sure I was headed for a root canal, so this is a WONDERFUL (and blessedly cheap) reprieve.