Thanks for your response, Christine. I have done a bit more reading on the web site about the treatment. The cost was a shock, however. I had previously found the web site http://www.ehow.com/facts_6908361_costs-hyperbaric-chamber-treatment_.html where they talked about much lower costs. Yesterday I called one of the area hospitals that does hyperbaric treatments and they were over $3,000. per treatment. We have talked to our insurance company and we have already met my husband�s deductible for the year and now �only� have to pay $2,500. out of pockets expenses and the insurance company pays 100% instead of 80%. We are going to another area hospital for a consultation today. I just wish he didn�t have to go through it all. It sounds like it is pretty successful with dental issues just expensive and time consuming. Did you have any side effects � visual, hearing or lung problems? Do you know how common they are? I am just such a worrier. Trying to be positive for my husband. Thanks again.