I still have a fistula, and have been told a bone graft is a must. I have a bad underbite as well. The place I went locally doesn't deal with insurance at all. I can't continue to live like this. Glue from dentures creeps thru fistula and I have to pick it out with a q-tip. I can't eat hardly anything. Any organizations that may help??? I also am curious as to any problems w implants???