Here's how you should be cleaning your teeth, according to a dentist Dr. Ellie Phillips, DDS, of Texas, recommends specific steps for proper oral care NEW You can now listen to Fox News articles! A team of scientists in London may have found a way to repair tooth enamel using an ingredient found in an unexpected place: human hair. Researchers at King’s College London experimented with keratin, the same natural protein found in hair, skin and nails, on teeth. In lab tests, the system "has shown