Do you want to visit the dentist and get a clean bill of health each time? Learning how to prevent cavities will go a long way towards ensuring you don't need to come back and get a filling.
The tooth decay that leads to cavities occurs when the bacteria in your mouth form a sticky plaque on your teeth.
When you eat or drink, bacteria use the sugars in the food and one of the byproducts is acid. The sticky plaque holds this acid against your teeth where it attacks your tooth enamel, leading to cavities.