Don't forget to brush your teeth

The ancient Romans used urine as toothpaste. It could be used as a mouthwash in its liquid form. Surprisingly urine is sterile. Romans also had tooth powder, which was skilfully prepared and generally used among them. They were made from abrasive materials such as the bones, hooves, and horns of certain animals, crabs, egg-shells, and the shells of oysters and the murex were the basis of the mixture. They were burnt and then sometimes mixed with honey and ground into a fine powder. The intention of the powder was not only to clean the teeth and make them white, but also to fix them when loose, to strengthen the gums and to relieve tooth aches.