Bone grafting or guided bone regeneration (GBR) procedures usually try to re-establish bone dimension, which was lost due to resorption. A bone graft normally takes at least four to six months to heal, before a dental implant can be placed into it. There are times also that multiple grafts may be needed to produce the amount of bone needed. This is dependent on a person’s health and the amount of bone being grafted. In certain cases, the surgeon may need to do a bone graft at the time of implant placement.
Replacing missing bone or adding to the existing bone is very often essential to the success of a dental implant and the ensuing restoration. The success of a dental implant and its ability to support a dental restoration is very much dependent on how much bone is available in the site where the implant is placed.
There are lots of things that affect the bone volume including things like, periodontal disease, trauma and infections and, in some cases, the sinuses may expand into available space, thus decreasing the bone volume. However, modern dental techniques assure that the success rate is quite high in patients who are basically healthy.