What is the role of saliva in oral health?

Saliva is essential for a healthy oral environment. It contains enzymes that help with the digestion of food and the control of bacteria. Its buffering capacity neutralises acids that attack tooth enamel. Minerals in saliva help to remineralise early cavities. Saliva washes food debris and bacteria away from the tooth surfaces. A dry mouth increases the risk of tooth decay and gum problems. Certain medicines and illnesses can reduce saliva production. Sugar-free chewing gum stimulates the flow of saliva as a natural form of protection. Drinking enough water supports healthy saliva function. Saliva tests can sometimes predict the risk of dental problems.