Fresh from the clogged tubes of teh intarwubs…
"Dr Takashi Tsuji, from the Tokyo University of Science, and his colleagues first removed the upper first molars from five-week-old mice. Then three weeks later, after confirming that no remaining components of the tooth root were present, they transplanted the germs into the jawbones of the mice. The seed-like tissues contained all the cells and instructions necessary to grow a tooth.
A green fluorescent protein was used to track the genes in the buds, which eventually grew into fully formed teeth with all the usual structures including enamel and blood vessels." One step closer to a utopian world devoid of dentists.