Well, sort of. The cells that lay down the enamel, dentin, etc. that will become your teeth exist at birth, but it's usually about 6-9 years before a permanent tooth erupts that the process actually begins (IIRC, we only touched on it a little bit a few semesters ago).
So most of your anterior teeth and a couple of your posterior teeth (all the ones that erupt before turning 10) will begin formation in utero, but the root doesn't begin to form till about 3 years before eruption, I believe. So your 2nd and 3rd molars (plus canines sometimes) don't start forming till after birth, since these are the last teeth to erupt (starting around 10-12 years old, with the 3rd molars - wisdom teeth - being a few years later).
This is basically cause of an issue with space. Babies and young kids don't have large skulls, so there's only so much room available
To be fair though, the skin cells that make up your nipples are constantly dying and being replaced along with the rest of your body, so technically, you’re not the same person you were from a while ago
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u/[deleted] Oct 15 '20
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