We couldn't get such a thing in India. We had to buy popsickle sticks and insert one at a time to gently expand and stretch my FIL's mouth, where he would bite down and then relax for 60 seconds morning and evening. It's best to do after some jaw warm-up first.

He was OK. This is one idea, anyways. No kidding!

FIL completed treatment 10/08. CG to father in Law in india who had SCC oral tongue T2N2M0. FIL underwent surgery, neck dissection, IMRT, and erbitux without losing weight or getting nauseated. Completed October 2008. SO far so good.