William Haseltine, founder of human genome sciences, founded the first regenerative medicine in 1992.

http://en.wikipedia.org/wiki/Tissue_engineering
http://www.utwente.nl/mira/research/tissue_regeneration/
http://www.lifecell.com/health-care-professionals/lifecell-products/allodermr-regenerative-tissue-matrix/allodermr-tissue-matrix-defined/tissue-regeneration/

scientist have found new methods to speed up tissue regrowth, the body can regenerate new tissue exactly where the body need new tissue, so the body is doing most of the work but the new technique allows tissue regeneration process to speed up so the person can be on their way faster.