Jaypea, you need an oncology oral surgeon who deals with this issue daily. You have osteonecrosis which, at this point may need surgery. My husband had that and a wonderful oncology oral surgeon removed the dead bone and 2 back teeth.
You will need IV antibiotics before and after surgery. This will require hospitalization, and the procedure is covered by insurance.
You can contact Primetimegail on this site, as she also had surgery for osteonecrosis. The procedure does not result in any disfigurement, but you may loose some teeth. The longer you wait the more likely you are to loose more teeth.

You need a very talented Oral Surgeon, not a Dentist. I didn’t realize that osteonecrosis lasted so long. I was naive to think it was a one time thing. Thank you for sharing, and I pray you get the help you need. I have 2 implants which were done a few years ago. I would be surprised if this would work. They have to put a screw into the bone, so the bone must be strong.
Paula🌹

Jaypea I am so sorry you are going through this. My husband saw an oral surgeon to have two teeth pulled. They both showed an infection in the root of the tooth. Dr. Forrest is one of 6 oral surgeons in Canada with his credentials. He did his final schooling in Texas but I cannot remember where. He was excellent and felt that Ken would have no problems with osteonecrosis because his bisphosphonate treatments had stopped over two years before. All the best to you🙏