http://www.oramd.com/recedinggums/2-gumsreceding.htm In cases where the root and supporting bone structure have been too severely damaged for the pocket reduction procedure, the advanced gum disease [...]

http://www.oramd.com/recedinggums/2-gumsreceding.htm In cases where the root and supporting bone structure have been too severely damaged for the pocket reduction procedure, the advanced gum disease treatment option of regeneration may be required. In regeneration, the basic idea is to regenerate damaged bone and supporting gingival tissue that have been dissolved by the advancing gum disease.