Dental Cavity (Decay) Formation Process In 3D Animation. Tooth decay is the destruction of your tooth structure. Plaque, a sticky film of bacteria, is constantly forming on your teeth. When you eat or drink foods or beverages containing sugars, the bacteria in plaque produce acids that attack tooth enamel. The stickiness of the plaque keeps these acids in contact with your teeth, and over time the enamel can break down, according to the American Dental Association (ADA). #caries #toothdecay #too