title: Epidemiologic survey on periodontal disease and oral hygiene in junior high school children.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D003753:Dental Health Surveys; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D009911:Oral Hygiene Index; D010510:Periodontal Diseases / Q000453:epidemiology*; D012737:Sex Factors