The Herald Sun has news of the trial of a first generation stem cell therapy for bone regrowth: "About seven weeks ago, Mr de Steiger harvested bone marrow from Mr Stevens' pelvis. The adult stem cells were then separated from the other cells. A sub-group of stem cells called mesenchymal precursor cells -- those that can transform into tissues including bone, cartilage and heart -- were isolated and grown. Last week, about 30 million of these cells were implanted into the 5cm x 3cm hole in Mr Stevens' thigh bone. The cells were coated on to pieces of calcium phosphate that act as a scaffold for the cells when they are placed inside the bone. The cells are expected to regenerate new bone and grow through the calcium phosphate."
Link: http://www.heraldsun.news.com.au/printpage/0,5481,18724594,00.html