Tiny bits of rock and shells is how ancient people kept their teeth clean, that and not consuming sugar every minute
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GTG3000@programming.dev 2 months agoWell, rocks in toothpaste would be very bad because they’d be harder than your teeth.
But_my_mom_says_im_cool@lemmy.world 2 months ago
sulgoth@lemmy.world 2 months ago
Harder? No. Enamel is harder than steel. It is more brittle though so don’t go chewing rocks.
GTG3000@programming.dev 2 months ago
Tooth enamel is ~5 on mohs scale. Quartz, the most common kinda rock (afaik), is ~7.
Fun fact, this is why we know ancient people used to make bread - the way they separated wheat from the chuff included dropping it on the ground, which led to sand being in the bread and consequently destroying their teeth over a lifetime of eating it.