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What Causes Tooth Decay?

Tooth decay happens when plaque — a sticky film of bacteria — feeds on sugars from food and produces acid that gradually erodes the tooth's enamel, eventually forming a cavity.

Tooth decay happens when plaque — a sticky film of bacteria — feeds on sugars from food and produces acid that gradually erodes the tooth's enamel, eventually forming a cavity.

Frequent snacking on sugary or starchy food, infrequent brushing, and skipping regular cleanings all speed up this process.

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Caused by acid-producing bacteria in plaque
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Frequent sugary snacking accelerates the process
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Regular brushing and cleanings slow decay significantly
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Caught early, decay is treated with a simple filling
Want the full picture? Read our complete guide: Tooth Filling →

FAQ

Can tooth decay be reversed?+

Very early decay (before it forms a cavity) can sometimes be reversed with fluoride and better hygiene — once a cavity has formed, a filling is needed.

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