SharkScrew in the Bone (IMAGE) Graz University of Technology Caption The big advantage of screws made of donated bone material: the donated material completely heals into the bones. Credit © surgebright Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.