Here's an interesting one. Japanese scientists have successfully grown mice teeth from single cells:
They used primitive cells, not quite as early as stem cells, and injected them into a framework of collagen, the material that holds the body together.
After growing them, they found their structures had matured into the components that make teeth, including dentin, enamel, dental pulp, blood vessels, and periodontal ligaments.
They were "arranged appropriately when compared with a natural tooth," the researchers reported in the journal Nature Methods.
The teeth grew and developed normally when transplanted into a mouse, said Takashi Tsuji of the Tokyo University of Science in Chiba, Japan and colleagues.
This provides me with great hope, for hopefully I can soon grow a new stomach to replace the habanero-damaged one I'm currently using.
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