Chewing gum in various forms has been around since ancient times. The Greeks, the ancient Mayans, and even Native Americans chewed sap from various trees.We tend to think of chewing gum as candy, but gum that gets the American Dental Association Seal can actually protect the teeth.Chewing gum increases the flow of saliva in your mouth. If you chew after eating, this increased saliva flow can help neutralize and wash away the acids produced when food is broken down. Over time these acids can break down the tooth enamel creating conditions for tooth decay. Chewing gum is no substitute for brushing and flossing but it works in conjunction with brushing, for maximum effectiveness. Select gums that display the ADA Seal.So far the only gums with the Seal are sugarless. The Seal is your assurance that the gum has met the ADA criteria for safety and effectiveness.