The history of smiles is, of course, as long as the history of man. Before speech, there was always that international universal language – the smile. Everybody knows what a smile means. Everybody knows how important a smile is. And everybody knows that if we don’t brush our teeth, our smile won’t be so attractive. But teeth and smiles haven’t always been as bright as they are today. Way back then, people didn’t have the means that we have today to keep their teeth white. They used some pretty crude methods of teeth whitening. So let’s look back at the history of teeth whitening and find out how people did keep their teeth white.
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