Well darn, my good luck has run out, and now I'm going to have to call the dentist. Thumbs down!
My 1990 molar crown has been a tiny, tiny bit loose for months. I learned my lesson 3 years ago to NEVER have dental work prior to going to WDW; so I waited. It is now more than a tiny bit loose - I can actually rock it with just my tongue.
According to the interwebz, the looser it is, the easier it is to remove and the more likely the crown is to remain intact.
Fingers crossed they can pop it off (DO NOT YouTube it - ugh), clean it off and re-cement it.
Either way, you know I'll keep you informed.