Well untreated Crohn's definitely zaps the body of nutrients -- so calcium, magnesium, zinc and lots of other vital stuff is often very low. difficult child 1 had osteopenia in his lumbar spine at diagnosis four years ago. They said nothing about the density of his teeth when we had the bone scan done at the time, so who knows? He's been in remission three years now, but the fact that he was likely dealing with this disease for five or six years before we realized what was going on had to have affected his teeth in some way. Yeah, so he's likely go the triple whammy of typical teen behavior difficult child-ness and after effects of disease-induced malnutrition. 
