Jerry,
Thanks for your reply.

Other than flouride toothpaste, I am not using any other flouride. I plan on requesting the flouride trays from my dentist when I see him in a few weeks though. I wonder why my dentist never suggested the flouride trays? Anyway, do the flouride trays need to be custom made? The ones they use in the dentist office are not custom, so I was just wondering.

As far as the broken tooth...neither dentist said that the fracture was caused by the radiation. Personally I think it was because the tooth may have cracked when my dentist filled it a few weeks prior to the fracture, but we can't know for sure.

Nine years out. New normal with limitations, but surviving and living life to the fullest.