I had a crown put in a few years ago (don't remember quite when) - I just know that I had pain in it about a year ago - this baffled me because I thought that there was supposed to be absolutely no feeling in the tooth - the crown got very wobbly but never fell out - here's why you have to go take care of it - mine got INFECTED. No amount of mouthwash or toothpaste will prevent that - it is a rotting tooth that has to go - my dentist told me that it wasn't a good idea to do the root canal again - rather to pull it and put an implant into my jaw (which unfortunately is about 1700 out of pocket for the implant). That is where I am headed today - to get my teeth pulled. I am scared to death but I know it has to be done - just think - the rotting tooth is in your mouth which is in your head, near your brain - the infection can spread and make you really sick, to say the least. And just think, the next time you kiss a girl, wouldn't you rather have one tooth missing than the smell of rotting teeth? Go get it checked out, please! Before it gets worse!