The prevalence and severity of periodontal disease in rural Nigerians.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009549:Nigeria; D010510:Periodontal Diseases / Q000175:diagnosis / Q000453:epidemiology*; D010512:Periodontal Index