Bone Graft Harvesting Surgery anterior iliac crest neurosurgery animations. A bone graft is bone placed at the desired fusion site to accelerate the fusion process. The bone can be harvested from somewhere on the client, called an autologous transplant or autograft, from another person, called an allograft, or a natural or synthetic bone substitute can be used. Autografts have higher fusion rates, and no immune rejection or disease transmission risks. Their disadvantages are that the additional procedure to remove the bone graft can increase post-operative pain, has its own complication risks, the bone is limited in its size, shape, quality and amount, especially in children, and it more often requires internal stabilization hardware and bracing for initial support. Visit http://www.medilaw.tv for more neurosurgery animations. Bone Graft Harvesting Surgery anterior iliac crest neurosurgery animations.