Oh well. At least it's in the back, so I don't go around looking like a toothless crone AND I've already had a root canal there, so there's no nerve to give me pain.
Well, now I know what I'm doing with one of my days off next week.
ETA-Actually it's only Tuesday and I don't think I can wait that long. I'm afraid the longer I wait, the more cracking may happen. I'll call and try and get an appointment for tomorrow.