Buster, I am one who firmly believes in HBO and how effective it is in helping to avoid ORN. Ive done many dives so I speak first hand about how well it worked for me.
Here is a similar recent thread on roughly the same subject. Check out my reply dated
2/10/14 and review the links on HBO and ORN. Then you can make a better informed decision. Many dentists are unfamiliar with the special care an OC patient requires. You may want to seek out another professional to do your extractions.
Best wishes!
Other HBO thread... read my post from 2/10/14 and the links