In Arabia and the Levant (and I think other areas around it as well) [swak (or miswak)](https://en.wikipedia.org/wiki/Miswak) was used for over 7000 years (without toothpaste or anything), some people rarely still use it these days as well (though more of a tradition than hygiene only I think). Other areas around the world would’ve probably used something similar I would assume!
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