
Ancient Era
In early Rome, people would gargle and brush with urine to help keep their teeth sparkling. And while the average Roman citizen would have probably used the urine of a slave, the more noble classes preferred only the best and most expensive: Portuguese piss, which was prized for its strength (probably due to its long delivery time)
Did it Work? Yes, but to a disgusting degree. Centuries later, scientists realized that the cleansing effect was due to ammonia, a key ingredient in urine which did kill germs, but by then the idea of brushing with piss (no matter whose) became as abhorrent as it is today and possibly gave rise to the term morning breath.
Middle Ages
During the Middle Ages and on into the Renaissance, Barber Surgeons (yes, they cut hair too) would file down the patients teeth and slather a corrosive solution of Aqua fortis (nitric acid) onto the surface, resulting in a very un-peasant like white smile.Did it Work?Yes. Well, for awhile anyway since the dazzling choppers eventually gave way to massive tooth decay. The acid etch wore away the protective enamel layer and fully exposed the tooth’s porous dentin layer. Rottinggums and blackened teeth anyone?
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