Well, it shouldn't be moving too much at all. Definitely not in a noticeable way. Go get it checked out. I hope its not cemented incompletely or that its so out of your bite that its putting alot of pressure and moving the tooth that much. Your tooth should be fairly stable. Try wiggling your other teeth and see if it moves as freely as the others
Thanks once again Jerome.
Mind you I guess I meant buffing the backside and not the underside of the crown. The back of the crown is where it meets with the bottom tooth.
But I'm still wondering. Is it common for the crown to move at all? Of course I'm merely talking a millimeter perhaps. 'and I only feel the movement if I place my finger over that crown whilst biting. Technically speaking, I 'Should' be able to bite into an Apple without worries, no? (not that I've tried yet, lol)
'and many thanks Jerome for being so helpful. :-)
I would imagine that buffing it (or adjusting the bite) is the only way she'll be able to remedy it besides making a brand new one which I wouldn't recommend. If its a minor adjustment, polishing down the height of the crown would be an acceptable remedy.