From the Telegraph: "The world's first custom-made bones that can be 'grown' in a matter of hours and fit precisely into a break could be available within three years. The new bones will replace damaged or ceramic versions that are currently used in reconstructive surgery. They are made of one of the key materials in human bone, calcium phosphate, which means they will not be rejected by the body and will be completely absorbed into the skeleton within a couple of years. ... We have just completed the investigative study and clinical trials are under way on patients. Some people have congenital defects, others have lost bone after undergoing surgery for cancer, while others have been in traffic accidents. The reactions we have had so far have been very favourable." Early days yet, along with flaws and limitations to the process, but this sort of medical engineering will improve just as rapidly as other biotechnology.