Hi Nicki - I'm so glad you found this site. It really is the very best place to be for the latest in information and compassionate caring from others who've had similar experiences. Sounds like your father has been through so much already and although my son's experience is not exactly the same as your father's, I'm sure someone will be along very soon with more direct experience and help for you. Until then, perhaps you could check the main OCF page at:
http://oralcancerfoundation.org/ and the links that interest you so that you can be ready with whatever other questions you might think of.