http://www.startribune.com/local/490460061.html > University of Minnesota researchers have broken new ground in the rapidly advancing field of 3-D printing: Creating stem cell-infused scaffolds that could be implanted in spinal cords to repair nerve damage. > The technology has existed for years to print plastic implants containing live cells. But the challenge was to do so in a way that would allow sensitive neuronal stem cells to survive the printing process so they can repair nerve damage after transplant.