A recent study of American adults showed that nearly a third do not floss their teeth.
The study looked at self-reports of more than 9,000 adults on the number of days they had flossed the week before.
In addition to 32.4% who never flossed, another 37.3% failed to floss daily.
The study found that failure to floss was higher in men, older adults, and African American and Hispanic adults.
Low-income participants were also less likely to floss, according to the study.
The study's author says the results show a need for stronger patient education on dental hygiene.