What causes milk teeth (primary dentition) to fall out?

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Offline chris

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What causes milk teeth to be lost? How do they "know" when the time's right to go...?
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Offline glovesforfoxes

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What causes milk teeth (primary dentition) to fall out?
« Reply #1 on: 30/12/2009 13:24:30 »
My guess is that they don't really know. It'll be a bit like puberty. Growth of the new teeth will just push them out at a certain time. I'm curious about the mechanism though.
The animals of the world exist for their own reasons. They were not made for humans any more than blacks were made for whites, or women for men. - Alice Walker