title: Significance of the labial frenum attachment in periodontal disease in man. Part I. Classification and epidemiology of the labial frenum attachment.
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D005891:Gingivitis / Q000209:etiology; D006801:Humans; D007742:Labial Frenum / Q000033:anatomy & histology* / Q000502:physiology; D008297:Male; D008334:Mandible; D008437:Maxilla; D010518:Periodontitis / Q000209:etiology