To place dentures, there must be an adequate amount of jaw bone available to provide a place for the dentures to seat. Soft tissue is not firm enough to give proper support for false teeth. Alveolar bone is the bone that holds the teeth in place. That is its only purpose, so once the teeth have been removed, the body figures it has no more use for it and it resorbs (dissolves away).  If the teeth have been missing for too long, then the available bone to hold a denture on is virtually nonexistent. That’s where bone augmentation helps. It is a surgical procedure to add bone to selected areas of the mouth. This will increase the height of the bony ridge and will give the denture more stability. There are a number of techniques available to add height to the jaw bone. These are particulate and bone graft substitutes. There are fancier membrane techniques where a thin membrane covers the graft material and allows the graft to heal undisturbed. There are autogenous bone grafts where a piece of bone form one’s own body is used and there are allografts which utilize cadaver bone for its source. The ridges can also be widened utilizing distraction osteogenesis. I will discuss each technique in more detail in Part II.