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Hope this turns out to be viable. It looks promising.
https://news.mit.edu/2022/frequency-therapeutics-hearing-regeneration-0329?fbclid=IwAR3IC5VGz0C5q07blPuclmt1yPJ2Sav425nZqVqa41kh5dhvb60x2lX2Kc8
That is a big deal, they could sell a ton of that stuff.
But if a little of it leaked you might grow hair on your teeth.
Better than this