Bone graft, taken from an intraoral or extraoral site and placed in the same individual. Origin of the graft will determine whether it is cortical, corticocancellous, or cancellous in nature. Particulate grafts may be harvested with hand instruments or prepared by introducing chips into a bone mill. Block grafts can be harvested when a cortical component exists (i.e., symphysis, ramus buccal shelf, calvarium, or iliac crest), when volume is not sufficient, and/or if there is a need to retard resorption. Autogenous bone grafts are often mixed with allografts, alloplasts, or xenografts. Also called autograft or autotransplant.