What is bone graft in dentistry ? Bone graft is used in almost 90% of the cases where a dental implant needs to be inserted. Losing a tooth means losing the bone around that tooth leaving a resorbed crest and in most cases there isn't enough bone to support a dental implant. Most patients do not really understand why they need extra bone or bone graft and sometimes they get confused. Dental implants require bone graft to increase the bone volume and create a stable position f