Probability of Having a Dental Cavity

Dental caries (cavities) is the most common chronic disease worldwide. The CDC reports that about 90% of American adults aged 20 and older have had at least one cavity, and about 27% of adults have untreated tooth decay. Among children, about 52% of kids aged 6-8 have had a cavity in their primary teeth.

Cavities form when bacteria in the mouth produce acids that erode tooth enamel. Risk factors include poor oral hygiene, frequent snacking on sugary foods and drinks, dry mouth, receding gums, and lack of fluoride. Socioeconomic factors play a major role: adults from lower-income households have about twice the rate of untreated cavities compared to higher-income adults.

Regular dental checkups, fluoride toothpaste, dental sealants, and limiting sugar intake are the primary prevention strategies. Community water fluoridation remains one of the most cost-effective public health measures, reducing cavities by about 25% across all age groups.