(Photograph by Associated Press)
The ideal prosthetic limb would behave like part of the natural body. Osseointegration allows prosthetics to fuse with a patient's living bone--it works by taking advantage of the fact that bone cells attach to titanium instead of rejecting it. The technique has already been used for small-scale dental and facial implants, and researchers are now bringing it to full-scale limb prosthetics. After a successful lower-leg implant in 2008 on a German shepherd named Cassidy, veterinary surgeons at North Carolina State University have six more leg operations on amputee dogs planned for 2010, and are considering a case involving an ocelot at the North Carolina Zoo. But the big challenge ahead is to implement the technology in human limbs.
