Fiber-rich fruits and vegetables. Foods with fiber help keep your teeth and gums clean, says the American Dental Association (ADA). They also get saliva flowing. Next to good home dental care, this is your best natural defense against cavities and gum disease. After you eat something that has sugars or starches, your saliva begins to reduce the effects of the acids and enzymes attacking your teeth. Saliva contains traces of calcium and phosphate. So it also restores minerals to areas of teeth that have lost them from the bacterial acids.

Cheese, milk, plain yogurt, and other dairy products. Cheese is another saliva maker. The calcium and phosphates in milk, cheese, and other dairy products, help put back minerals your teeth might have lost due to other foods. They also help rebuild tooth enamel.

Green and black teas. These teas both contain polyphenols that interact with plaque bacteria. These substances either kill or hold back bacteria. This prevents bacteria from growing or making acid that attacks teeth. Depending on the type of water you use to brew your tea, a cup of tea can also be a source of fluoride.

Sugarless chewing gum. This is another great saliva maker that removes food particles from your mouth.

Foods with fluoride. Fluoridated drinking water, or any product you make with fluoridated water, helps your teeth. This includes powdered juices (as long as they don't contain a lot of sugar) and dehydrated soups. Commercially prepared foods, such as poultry products, seafood, and powdered cereals, also can give fluoride.

Sticky candies and sweets. If you eat sweets, go for those that clear out of your mouth quickly. So thumbs down for lollipops and caramels that have refined sugar. The ADA states that chocolate washes off the teeth more quickly than other candies. Dark chocolate (70% cacao) does have some health benefits. Some studies have shown chocolate is not as bad as other sugary treats.

Starchy foods that can get stuck in your mouth. Soft breads and potato chips, for instance, can get trapped between your teeth. 

Carbonated soft drinks. These drinks are the leading source of added sugar among kids and teens. They are loaded with sugar. And most soft drinks have phosphoric and citric acids that wear away tooth enamel.

Substances that dry out your mouth. These include alcohol and many medicines. If medicines are the cause, talk with your dental care provider about getting a fluoride rinse, or a fluoride gel for brushing your teeth.

Eat sugary foods with meals. Your mouth makes more saliva during meals. This helps to reduce the effect of acid production and to rinse pieces of food from the mouth.

Limit between-meal snacks. If you crave a snack, choose something nutritious. Think about chewing sugarless gum afterward to increase saliva flow and wash out food and acid.

Drink more water. Fluoridated water can help prevent tooth decay. If you choose bottled water, check the label for the fluoride content.

Brush your teeth twice a day.

Floss once a day.