Closer to Custom-Built Body Parts?

According to researchers in Finland, scientists are a step closer to being able to make custom spare parts for humans using stem cells. Riitta Suuronen of the Regea Institute of Regenerative Medicine, part of the University of Tampere, said at a press conference today that the researchers used a 65-year-old patient's own stem cells, which they nurtured and cultivated into bone tissue in the lab, to rebuild his upper jaw. —Heather Wax