How: a graft helps the body replace the missing tooth root area with strong, healthy bone. There are different types of graft materials, an autograft (self), a cadaver, and a synthetic graft. There are also different methods of placing a graft depending on the quality of bone, the surgical area, and other factors. Talk to your doctor about what type of graft is right for you. After the graft is placed, it is covered with a tissue membrane and sutured.