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How does age affect the whiteness of my teeth?

Age can make your teeth appear yellower. The outside covering of your teeth is called enamel, and it gets thinner over time. The dentin beneath the enamel tends to get more yellow as you grow older, and as your enamel thins, the yellow dentin shows through. Injuries, such as chipped teeth, can also discolor your teeth, as can smoking. Your dentist can suggest ways to whiten teeth that have become discolored over time. 
Age may cause certain stains to show more prominently on your teeth. The inner parts, or the dentin, of teeth becomes yellower as you age. You also begin to lose the outer enamel. Because of this, the yellowed dentin shows through the outer enamel to give the appearance of yellow teeth.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.