Imagine how great it will be someday when you can replace damaged joints with a new one regrown from your own stem cells. This has been done! BBC NEWS: US researchers have developed a promising new technique that might one day enable doctors to regrow broken or diseased joints in patients. Writing in the The Lancet, US researchers say they have regrown the forelimb thigh joint of rabbits using their own stem cells. Scientists say they have shown “proof of principle” for the technique which could replace hips. It was the first time an entire joint surface had been regenerated with the return of functions, they said. The research could benefit patients with damaged hips, shoulders or knees.