Association of flossing/inter‐dental cleaning and periodontitis in adults

摘要

Abstract Aim Assess the association of flossing with periodontitis. Materials and Methods This was a cross‐sectional study using the National Health and Nutrition Examination Survey ( NHANES ) years 2011‐2014. We used three categories of flossing: 0–1, 2–4 and ≥5?days in the past week and the CDC definition of periodontitis. We calculated odds ratios controlling for age, gender, smoking, drinking, income and dentist visits. Results A total of 6939 adult subjects were included, 35% flossed ≤1 time a week, and 40% had periodontitis. After adjustment, the odds of periodontitis were 17% lower for subjects who flossed 1 time a week than for subjects who flossed less often (odds ratio=0.83, 95% CI 0.72–0.97). A dose response was not observed. Men were twice as likely as women to have periodontitis. Younger subjects, non‐smokers and subjects with the highest incomes had lower odds of having periodontitis. Conclusions Flossing was associated with a modestly lower prevalence of periodontitis. Older age, being male, smoking, low income and less frequent dental visits were associated with a higher prevalence of periodontitis. Flossing 2–4 days a week could be as beneficial as flossing more frequently. This is a cross‐sectional study so a causal relation between flossing and periodontitis cannot be established.