Hi, Sone -

I might also suggest an exercise routine my prosthodontist gave me: Using the thumb of one hand and forefinger of the other, pull your mouth open as wide as possible and hold, stretching the jaw muscle (not til it hurts a lot, but you need to feel the stretch!). Hold for a count of 7, then repeat 10 times. Do this routine three times a day (I do it after eating just to be sure I remember).

This ideally will enable you to maintain/improve your mouth opening. I'm about to start radiation myself and have been told it's crucial to keep doing my exercises throughout (I'm anticipating extra pain from the radiation, so haven't had to face that yet). My prosthodontist said that if I feel I need a Therabite to help me through, I should definitely get one -- consider that, too. Just Google it to see some info.

Good luck as you continue your treatments! We're all pulling for you!