I also had dry mouth but after a year I am starting to get some saliva back. I had Amifostine/Ethiol but only completed half the series because I developed allergy to it.

You might also ask them about a dental/saliva stent to protect teeth and saliva:

Dental Stent at M.D. Anderson CC


Age 67 1/2
Ventral Tongue SCC T2N0M0G1 10/05
Anterior Tongue SCC T2N0M0G2 6/08
Base of Tongue SCC T2N0M0G2 12/08
Three partial glossectomy (10/05,11/05,6/08), PEG, 37 XRT 66.6 Gy 1/06
Neck dissection, trach, PEG & forearm free flap (6/08)
Total glossectomy, trach, PEG & thigh free flap (12/08)
On August 21, 2010 at 9:20 am, Pete went off to play with the ratties in the sky.