There are several types of bone grafts. We prefer to use donor bone harvested from human cadavers.nnAllogenic bone is taken from a cadaver, and since it is dead bone, it cannot produce new bone but serves as a structure that your surrounding bone can grow around and fill in.nnXenogenic bone is harvested from non-living animal sources, often a cow, and also acts as a scaffold over which your bone can grow.nnAutogenous bone grafts are created from your own bone. The bone is usually taken from the mandible for smaller bone grafts and the hip when a larger amount of bone is needed.