What happens when teeth are removed and replaced with dentures, is alveolar bone loss. The alveolar bone is the malleable bone around your teeth that can be adjust with braces, but which resorbs and goes away over time when the teeth are pulled. It is not, to my knowledge, the use of dentures that causes the bone loss, but rather the lack of stimulation and maintenance of the bone caused by the action of the upper teeth against the lower teeth. In fact, dentists and oral surgeons will replace missing teeth with dental implants to try to prevent the loss of alveolar bone. Unfortunately, face lift surgery will not fill in the bone loss. It may make it less apparent, but that can only be determined on a case by case basis and only after the surgery. What you may want to do, is ask you dentist to build up your dentures to take the place of the bone loss.
My best,
Robert G. Anderson, M.D., F.A.C.S.