Soda vs. Your teeth. In our office we often see the damage to teeth caused by soft drinks. Most people seem to be aware of the damaging effect of soft drinks on their teeth but are not concerned by it. According to the American Dental Association, Americans drink more than53 gallons of soft drinks per person per year. Some soft drinks contain more than 11 spoonfuls of sugar which is used by the bacteria in your mouth to cause decay. Of greater concern is dental erosion which is caused by acids in soda such as carbonic acid, citric acid, and phosphoric acid. You have seen what happens to a penny when you soak it in soda for a few hours. Over time these acids can damage the enamel of your teeth and lead to decay and need to restore those cavities. If a beautiful, healthy smile is your goal than avoiding soda is a good idea.