title: [Prevalence of periodontal disease in 15-year-old schoolchildren in Japan (author's transl)].
mesh_terms: D000293:Adolescent; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D009910:Oral Hygiene; D010510:Periodontal Diseases / Q000453:epidemiology*; D012737:Sex Factors