The more sugar you eat, the more cavities you get
False: When it comes to causing cavities, how long sugar has contact with your teeth is more important than how much sugar you eat. Sugar produces acid that eats away at tooth enamel. The longer sugar is in your mouth, the more acid forms, and the longer your teeth are exposed to it.
Sugar-free soda can hurt your teeth
True: It’s not just the sugar in soda that’s a problem. Carbonated drinks are high in acid, and that destroys tooth enamel. Acid can even be harder on teeth than sugar. The bottom line: Avoid sugary and sugar-free sodas. Drink water – preferably fluorinated — instead
True: Vegetables like carrots and celery are high in fiber and water, which help clean teeth. They also get more saliva flowing.
This neutralizes the acids that cause cavities and gum disease.
Foods like tomatoes and citrus fruits are healthy but acidic. So eat them at a meal, when saliva can help wash acid away. Dried fruits are also healthy, but they are high in sugar and can remain on teeth for a long time. If you want fruit, consider a fiber-rich apple instead.