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Cavities

how-cavities-form

Cavities are what you get from tooth decay — damage to the tooth.Tooth decay can affect both the outer coating of a tooth (called enamel) and the inner layer (called dentin).

Treatment depends on how bad the cavity is. Most often, the dentist removes the decayed portion of your tooth with a drill. He fills in the hole with a filling made of either silver alloy, gold, porcelain, or a composite resin.