Jack has had to have three teeth removed. Not because of too much candy, no, but because he clenches his teeth while he sleeps.
(Right, little background, if you clench your teeth while you sleep it can lead to: headaches the following morning, chipped teeth, cavities if you don't get the chipped teeth taken care of, and root canals if you don't get the cavity taken care of. (I think I missed a step there... I'm not a dentist, sue me. (Don't actually.)