This is totally unbelievable!

Someday, perhaps, printers will revolutionize the world of medicine, churning out hearts, livers and other organs to ease transplantation shortages. For now, though, Darryl D’Lima would settle for a little bit of knee cartilage.

Dr. D’Lima, who heads an orthopedic research lab at the Scripps Clinic here, has already made bioartificial cartilage in cow tissue, modifying an old inkjet printer to put down layer after layer of a gel containing living cells. He has also printed cartilage in tissue removed from patients who have undergone knee replacement surgery.


http://www.nytimes.com/2013/08/20/science/next-out-of-the-printer-living-tissue.html?ref=science&_r=0