Your general health and your resistance to many diseases depend a lot on eating a healthy, balanced diet.
Your eating and drinking habits also affect the health of your teeth.
Dental plaque is a soft, sticky substance that builds up on your teeth. It is mostly made up of bacteria, which feed on sugar from food and drink, producing acids as a waste product. The acids attack the teeth by disolving the minerals in the tooth surface. If this happens too often, tooth decay results.
Acids in food and drink can disolve away tooth surface. All fizzy drinks, all squashes and all fruit juices are acidic to varying degrees. Citrus fruits are examples of acidic types of food.
After an acid attack, teeth can repair themselves, given the opportunity. It helps if fluoride is present in the mouth.
Source: BDA Leaflet