Hello!
I am sorry you are also going through this. My Cancer was on my top gum area, and I also wear an Obtrator. My surgery was in Sept 12, and Radiation ended in Dec 12. Post radiation I developed severe Trismus, and was down to about 4cm opening. I have faithfully stretched my mouth for 90 minutes each day with a Dynasplint. I am now about a 12 cm opening.
I also have had one round of Botox injections at MD Anderson to help with the Trismus. The Botox injections helped, and my opening was about 17-18cm for the first few months following Botox. Just this past week, my mouth is closing again, thus I am back down to 12cm. My next Botox treatment is in July--every three months. I do feel the Botox helped. I feel the Dynasplint has helped (minimally), but I will take anything I can get.
Best Wishes. I am happy to answer any of your questions. I just had a clean PET Scan Friday! My mouth still hurts, and I still feel numbness on my right side of my face, but I count my blessings. I am still working full time, and life is about 90% normal for me. I will be happy to answer any of your questions.