I had ORN in the right mandible and had a partial mandibulectomy in October 2014. The dead bone and four teeth were removed and the fistula track was closed. I spent one night in the hospital and had an uneventful recovery. I was and am on a PEG tube with NPO. Prior to the surgery I did have 30 HBO dives. I decided not to have reconstructive surgery and do have disfigurement, but your surgery is at the ramus, and I can understand that little disfigurement seems possible. Your ORN seems not to have advanced toward the chin as mine did, but your surgery sounds more complicated. I wish you the best.