David,
I would be very interested to know more about your radiation treatment plan if you would (because I'm still trying to figure out why I have these mouth problems 18 mod after). For example, was your Rad. for the oral cavity, both sides, from where to where (mine both sides 66 gy bottom of my parotids to just above adam's apple) - does your mouth still burn when you eat, can you now eat normal food, trismus, really dry?