If someone asked you what you thought the hardest surface in the human body was, you probably would not guess that it was inside your mouth. However, teeth, thanks to tooth enamel, are the hardest surface in our bodies. This enamel helps make teeth whiter and protects them. Unfortunately, despite being so hard, tooth enamel is susceptible to losing its whiteness due to smoking, drinking coffee and soft drinks, aging, genetics, and more. This discoloration can leave us with a less than a brilliant smile. When this happens, it can affect our self esteem negatively. Fortunately, there are ways of…