When you drink soda, the sugars it contains interact with bacteria in your mouth to form acid. This acid attacks your teeth. Both regular and sugar-free sodas also contain their own acids, and these attack the teeth too. With each swig of soda, you’re starting a damaging reaction that lasts for about 20 minutes. If you sip all day, your teeth are under constant attack.
Erosion & Cavities
There are two main dental effects of drinking soda: erosion and cavities.
Erosion begins when the acids in soft drinks encounter the tooth enamel, which is the outermost protective layer on your teeth. Their effect is to reduce the surface hardness of the enamel. While sports drinks and fruit juices can also damage enamel, they stop there.
Cavities, or caries, develop over time in people who drink soft drinks regularly. Soft drinks, on the other hand, can also affect the next layer, dentin, and even composite fillings. This damage to your tooth enamel can invite cavities. Add in poor oral hygiene, and a lot of damage can occur to the teeth.
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