title: Is the prevalence of periodontitis in the USA in decline?
authors.forename: Charles M
authors.initials: CM
authors.lastname: Cobb
authors.forename: Karen B
authors.initials: KB
authors.lastname: Williams
authors.forename: Mary M
authors.initials: MM
authors.lastname: Gerkovitch
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D003753:Dental Health Surveys; D006801:Humans; D008875:Middle Aged; D010518:Periodontitis / Q000453:epidemiology* / Q000208:ethnology / Q000517:prevention & control; D015995:Prevalence; D014481:United States / Q000453:epidemiology; D055815:Young Adult