title: Chronic gingivitis in school-age children--a review of the literature.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D005260:Female; D005891:Gingivitis / Q000453:epidemiology / Q000209:etiology; D006801:Humans; D008297:Male; D009911:Oral Hygiene Index; D010510:Periodontal Diseases / Q000453:epidemiology / Q000209:etiology