And, today Dr. Oz showed an actual surgery where a patient who had had a mastectomy later underwent a surgical procedure to rebuild her breast, using a now-experimental process which removes fat from one part of the body, injects it with her own harvested stem cells, and a new breast grows.
There followed a discussion about other experiments now being conducted with veterans who have lost limbs, and the potential for regrowing them using stem cells.
I'd go through teething again if I could regrow my teef. The store bought ones are never where they are supposed to be.
And there is some research on that, as well.
/johnny