Replaceable Teeth

At about age 6, children grow an entirely new set of teeth. In our evolutionary history, people rarely lived past 25, so two sets per lifetime were quite sufficient. How do the teeth know to grow a new set? There must be some hormone that tells them too. If we can find out what it is, synthesise it, then we could give adults a new set of teeth too. I doubt dentists would be keen on the idea and a year of gap-tooth smiles might not be the Vogue ideal, but it would be preferable to living the rest of your life with false teeth.

~ Roedy (1948-02-04 age:70)