I had what is called a segmental mandibulectomy, aka Full Thickness, of the jaw bone whereby the sectio. is cut out. I guess each situation is differen as to the extent since there are many parts of the jaw, but the ramus and body makes a large part of the mandible. It must have included the "angle" too since that's in between these two structures.

I was probably on morphine in the hospital, and Percocet thereafter. Pain was minimal.

I've also had a cervical approach for surgery where access was gained from the outside instead of interorally.

A few weeks before surgery, I had a Ct scan. I think my ENT uses a 3D model of the jaw to plan surgery.

Maybe ask your doctors what sections are planned on being removed, how the jaw is being accessed. I also had no teeth from prior surgery. Some get implants during this surgery, but that can depend on a number of factors, including amount of radiation, which already caused ORN, but it's new bone, so it may be possible in some cases.