[quote]the problem is, trying to convince him to do anything. If he doesn't hear it directly from the doctor, he doesn't really believe in it[/quote]
Be grateful that your Dad isn't being fooled by all the Internet fraud sites and the bogus cancer cure clinics they advertise.
Instead, type up some questions for him to ask his doctor:
1. Can you recommend a good prosthodontist or dentist with oncology expertise? Then make the appointment.
2. Would you please take a TSH level (thryoid) test ?
(radiation even now can mess up your energy level since it messes up your thyroid). Get the exact numbers as the lab test range is too broad. Also scour his medical records to see if he has even had a TSH test before since you want the numbers to be the same now as they were then.
3. Please write a prescription for swallowing & speech therapy. It will make a world of difference in his recovery
That will get him started on a much better recovery. It is amazing that you have to actually proactively ask many doctors for all of the above when it should be standard, but as you have found out, you must be your own advocate here.
Last but not least, let your Dad know that this advice is from someone just a few years younger than he is who has found all of that very helpful.
Charm