One of the most common dental procedures done today is teeth whitening. Most of us start out with brilliantly white teeth as children but with day to day habits such as drinking coffee, soda, tea, and wine, as well as certain medications we take, our teeth lose their natural enamel. The dentin inside the tooth, which is yellow becomes more noticeable as the enamel becomes more transparent. While you chew and talk the dentin inside your tooth remains intact while the enamel sustains thousands of microscopic cracks. It is in these tiny cracks that the stains and debris build up causing your teeth to discolor.