Donated bone is often needed in orthopaedic surgery. Whilst your own bone is best, there is a limited amount that can be harvested, and in some situations using donated bone is more appropriate.
As answered previously, a lot of bone in Australia is donated from hip replacements, where the head of the femur (thigh bone)is removed. Some bone is also sourced from Cadaver donation along with soft tissue grafts, such as tendons needed in revision or complex ligament reconstructions.
Biologic bone is always better than substitute bone grafts and has excellent results in restoring bone that has been lost during fractures, revision joint replacements and complex knee reconstructions.