Grafting involves hard or soft tissue. Hard tissue grafts involve the placement of bone in areas of bone loss. There are three types of grafting material Dr. Gulino can use. Allograft bone is from a cadaver. Autograft bone is purified human bone from your own bone such as, hip, knee or jaw bone. The advantage to using your own bone is the reduced risk of your body rejecting the graft material. Bovin or xenograph bone is non-human bone. There are other sources of bone supplied by manufacturing companies producing mineralized and non-mineralized bone. Soft tissue grafts are used to replace gum tissue for exposed roots, or for covering lengthy implants.