David,
Clark goes to the dentist every three months for cleaning. But I agree he should be using the trays for the rest of his life. He is stubborn. He thinks the trays have caused the shifting of his teeth. I don't buy that. If anything, the trays may have helped keep his teeth in line a little longer. But what do I know. I am not a dentist or an orthodontist. Maybe the shifting of his teeth was inevitable, given the numerous surgeries and radiation.

Christine,
Clark did use a rinse post surgery (07) that did cause some discoloration. He hasn't used anything since then. Did you mean that fluoride can cause staining, too? I had forgotten that you had your teeth removed. Geez, discolored and crooked teeth are a small concern compared to not having them at all.

Karen,
The one tooth that is the worst has slid toward the inside of his mouth, behind the other teeth. I'm guessing that radiation is the main cause for this, NOT the removal of his molars.

Thanks for the comments, everyone!

Anita