Researchers at the Forsyth Institute said their successful experiment suggests the existence of dental stem cells, which could one day allow a person to replace a lost or missing tooth with an identical tooth grown from his or her own cells.
The research may signal that the days of synthetic dental implants--dentures, bridges and crowns--are numbered. "

[W1ld sent me this: *start rant* I just wanted to say that I think that it is interesting that they are calling these "dental stem cells". When it comes right down to it, all cells are "stem cells", we just don't have enough knowledge of genomics quite yet to make that a reality. Every cell in your body (excluding red blood cells) contain a copy of your entire genetic code. The only difference is that early in development, some genes are turned off never to be turned on again, while others get promoted, based on what that cell is destined to be. Once we know more about our genome (thanks to the human genome project and other projects stemming off of it), and once we know more about developmental genetics (how cells develop into specific tissues via protein expression and how to turn genes on and off when we want to), we will be able to harness this information to turn one cell into another or grow specific cells and tissues. Ahem. *end rant* Have a nice day:)

Yahoo! News - Scientists Grow Pig Teeth in Rat Intestines