Mucosal graft vestibuloplasty over a xenograft: report of case.

A case is described that demonstrates the use of DDBB to eliminate an anterior undercut in the augmentation in the edentulous mandible. Subsequent vestibular extension using a free mucosal graft was performed superficially to the xenograft bed. This material is extremely useful because it is biologically bonded to underlying bone and is not jeopardized by a second surgical procedure in the graft region.