I am so sorry to hear Barry-My dad had all of his healthy molars pulled asap. They encouraged him to do physical therapy 7 times a day for 5 minutes to keep the jaw in shape:
Open your mouth as wide as you can and shove that many tongue depressors in there. It keeps your muscles primed. For my dad, the healing of his pulled teeth would have been a delay in treatment. Also, practice obsessive dental hygeine to get in the habit. Floss, swish, brush. The dentist said if you do choose to keep teeth with caps, the radiation has been known to bounce back and cause burns in the cheeks. You can have an acryllic brige made. Also get flouride trays. Bulk up Barry! Eat tons-my dad is gaining weight right now- Cut out smoking and drinking, keep VERY hydrated.
Peace and love.