Doctors and engineers in Washington have been working on a project which involves creating new bones with a 3D printer. The new material can be added to a damaged bone and provides a scaffold on which the repair can be formed from new cell growth.
Using special ceramic powder the replacement bones are built up in three dimensions by the addition of layer upon layer of material less than half the thickness of a human hair. In time it's hoped that bone replacements could be built on demand to speed up the natural repair. When completely stabilised, the scaffold material will dissolve leaving only new, healthy, strong tissue.