Josephina, a 61-year-old woman, lived and took care of an elderly friend half the year on the coast of Oregon. She is a quiet spoken, thoughtful woman who had cancer in her mouth 18 years prior to coming in for hyperbaric oxygen therapy. The radiation that was used to treat her cancer many years before was very successful. However, she went to her dentist and complained of her tooth feeling loose. The radiation had started to damage the circulation in her mandible and her gums. Her tooth had died and her dentist wanted to remove it. Her dentist also thought that she had two other teeth that were threatened as well. Josephina was sent to an oral surgeon who diagnosed osteoradionecrosis, which is death of the bone due to radiation injury. The blood vessels in the jaw start to die off due to radiation damage. When this happens the bone can get very fragile and sometimes fracture which creates a much bigger problem including a long and difficult recovery. So to avoid this, and prior to taking out her tooth, her surgeon sent her for hyperbaric treatments. The Marx protocol was used which included 20 treatments prior to removing the tooth to revascularize and thus strengthen the jaw. After removing the tooth Deborah returned for the remaining 10 more session to insure the bone heals up properly. In her case, Josephina was fortunate that the bone was strengthened with hyperbarics prior to more teeth dying. Indeed, she was pleased that she did not lose any further teeth. Two years later she came back to visit and say hello. She still had all the rest of her teeth.