Some level of tooth decay is an inevitable result of time, acidic foods, and wear on your teeth. Patients have an important role to play in preventing the onset of cavities. Good oral hygiene habits are important. Brushing, flossing, and using mouthwash reduce the presence of plaque and prevent the buildup of tartar. Plaque and tartar provide a home for bacteria that allows them to slowly eat away at your enamel.