Tooth decay (dental caries) is damage to a tooth that can happen when decay-causing bacteria in your mouth make acids that attack the tooth’s surface, or enamel. This can lead to a small hole in a tooth, called a cavity. If tooth decay is not treated, it can cause pain, infection, and even tooth loss.
People of all ages can get tooth decay once they have teeth—from childhood through the senior years.
Young children are at risk for “early childhood caries,” sometimes called baby bottle tooth decay, which is severe tooth decay in baby teeth.
Because many older adults experience receding gums, which allows decay-causing bacteria in the mouth to come into contact with the tooth’s root, they can get decay on the exposed root surfaces of their teeth.
When decay-causing bacteria come into contact with sugars and starches from foods and drinks, they form an acid. This acid can attack the tooth’s enamel causing it to lose minerals.
This can happen if you eat or drink often, especially foods and drinks containing sugar and starches. The repeated cycles of these “acid attacks” will cause the enamel to continue to lose minerals. Over time, the enamel is weakened and then destroyed, forming a cavity.
In early tooth decay, there are not usually any symptoms. As tooth decay advances, it can cause a toothache (tooth pain) or tooth sensitivity to sweets, hot, or cold. If the tooth becomes infected, an abscess, or pocket of pus, can form that can cause pain, facial swelling, and fever.
Tooth decay can be found during a regular dental check-up. Early tooth decay may look like a white spot on the tooth. If the decay is more advanced, it may appear as a darker spot or a hole in the tooth. The dentist can also check the teeth for soft or sticky areas or take an x-ray, which can show decay.
Dentists commonly treat cavities by filling them. A dentist will remove the decayed tooth tissue and then restore the tooth by filling it with a filling material.
Here are some things you can do to prevent tooth decay:
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