howtobehealth.net
6 habits make your teeth no longer whiter - How to be Health
Harold Katz, a dental dentist in California, said that the outermost layer of tooth enamel is usually white to pale blue gray. As the enamel becomes thinner, the lower yellow dentin will gradually appear. Fortunately, by changing the following six wrong habits, you can keep your enamel healthy, avoid dentin exposure, and avoid stains that... Read More