I am having issues with trismus also after my surgery. I have not started the rad. yet and my RO is not sure I will be able to even have a mouthpiece because he doesn't think they'll be able to get it in my mouth. When you say you can't afford the thera-bite system, does that also mean you can't affort PT? My RO is sending me for PT-- first visit is tomorrow and I'll let you know if he tells me anything else you might be able to try. Is the cyclobenzaprine making any difference for you?