An option, if possible, to having tooth extractions is root canal, so you don't need HBOT, and no injury that may cause ORN. For guys, a quick indicator may be if you are able to to grow facial hair where teeth need extraction it may be ok, if not, HBOT may be needed. It also depends how far out you are from radiation. All my teeth are down to the gum lines, and my hospital is pro HBOT, so have to see about it soon, again. The reason the bottom teeth may be mentioned is ORN mostly occurs in the mandible, and understand ORN, with IMRT, is low, maybe 3%, but I'm not taking any chances, and following my doctor's advise. I had too much radiation anyway.

All the best.