Your smile is important. It’s one of the first things people notice when they meet you, and a brighter, whiter smile can help you feel better about yourself and leave a lasting impression. Unfortunately, a multitude of factors conspire against you to stain your teeth. No matter how often you brush them, coffee, tea, red wine, colas, tobacco and even orange juice will slowly but surely seep into the pores in your enamel and turn your teeth yellow.
The surface of your teeth contain millions of microscopic pores, and over the years, organic compounds from foods, drinks, and other habits like smoking penetrate these pores causing discoloration. Teeth whitening works when hydrogen peroxide breaks down into oxygen molecules, which penetrate through the enamel and go into the dentin, which is directly under the enamel. These molecules penetrate into the tiny pores of the enamel and dentin and bleach the colored substances.
Fortunately for you, science and technology have advanced to the point where you can undo years or even decades of staining in as little as an hour.