That's because dead bone does not constantly repair itself like normal bone does. (sciencemag.org)
Edward Schwarz, a molecular immunologist at the University of Rochester, New York, wondered if the key to converting dead bones into living ones was restoring this blood supply and calcium regulation. (sciencemag.org)
To investigate, Schwarz and colleagues observed mice implanted with healthy and dead bone implants. (sciencemag.org)