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doughy1882 t1_is9u0y6 wrote

Your bottom teeth are constantly pushing your top teeth back into place and vice versa.

There is stuff that holds them in, but over time your body would push the teeth out

I had a top wisdom tooth with nothing below and it eventually starting dropping down.

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Keyspam102 t1_is9vt7k wrote

Yup this is why it’s important to replace lost teeth, the pressure against the opposite tooth plus the pressure against the jaw is very important to how your mouth/jaw functions over the long term

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tikkymykk OP t1_is9vcrg wrote

This is the answer that explains it for me. I finally understand. So simple and obvious but never crossed my mind.

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