[The role of oral bacteria in periodontal diseases].
D003773:Dental Plaque / Q000382:microbiology; D003813:Dentistry; D005892:Gingivitis, Necrotizing Ulcerative / Q000382:microbiology; D010510:Periodontal Diseases / Q000382:microbiology
Ho rolos ton mikrobion eis ten aitiopathogeneian ton noson tou parodontiou.