Bill,
You say you have been "suffering" from hyperkeratosis of the anterior palate. Would you be so kind to let me know what symptoms your are experiencing? I would also like to know if you use tobacco and/or alcohol on a regular basis. How long ago did you first experience problems?
I'd like to try and help you if I can I just need a little more information in order to give you proper advice.
Contact me by PM or e-mail if you wish.
Cheers,
Mike