Now that you know what foods you should be eating, here are some foods that you should avoid. 1. Hard Candies Not only are hard candies full of sugar, but they are also sticky. These means that the sugar sits closer to the teeth for a longer amount of time, which gives the bacteria more opportunity to use the sugar as fuel to create acid. It can also cause broken teeth and restorations. 2. Ice This one may surprise you! While ice doesn't have any sugar or even any calories, chewing on ice can also cause broken teeth and restorations. It can also weaken enamel, the strong outer layer of the teeth that cannot be repaired. 3. Citrus Citrus may seem like a good choice because it's fruit, but citrus is high in acid. Sucking on lemons or eating lots of grapefruits and oranges can erode enamel, causing sensitivity and making it easier for cavities to penetrate the enamel. They can also irritate sores like canker sores. 4. Sticky Foods Sticky fo