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For thousands of years, people have been using various methods to keep their teeth clean and white. Ancient Romans would actually use urine to cleanse teeth and keep them shining and Egyptians would cleanse their teeth with a pumice and vinegar concoction. Clean white teeth have long been a sign of not only cleanliness, but status as well. In ancient times, having clean white teeth was usually a clear indicator of how wealthy you were. It was also considered a mark of beauty, and remains so today. Modern Teeth Whitening Systems - Reconnecting with the Past Fortunately, advances in cosmetic dentistry have allowed us more sophisticated methods of teeth whitening and we are not left relying on primitive methods such as urine to help keep our pearly whites pearly. However, if it were not for these early methods, dentists of today would not have had a basis for determining what works at keeping our teeth white. For some time, acids were used to clean and whiten teeth, however it was