title: Development of the World Health Organization (WHO) community periodontal index of treatment needs (CPITN).
mesh_terms: D000293:Adolescent; D000328:Adult; D006301:Health Services Needs and Demand; D006801:Humans; D008875:Middle Aged; D010510:Periodontal Diseases / Q000175:diagnosis / Q000453:epidemiology / Q000628:therapy*; D010512:Periodontal Index; D014944:World Health Organization