[Prevalence of periodontal disease in 12-18-year-old schoolchildren in Hiroshima].
D000293:Adolescent; D002648:Child; D005260:Female; D005883:Gingival Crevicular Fluid / Q000453:epidemiology; D005884:Gingival Hemorrhage / Q000453:epidemiology; D006801:Humans; D007564:Japan; D008297:Male; D010510:Periodontal Diseases / Q000453:epidemiology*; D010514:Periodontal Pocket / Q000453:epidemiology; D012737:Sex Factors