The aetiology of periodontal disease.
D018407:Bacterial Physiological Phenomena; D003773:Dental Plaque / Q000382:microbiology; D005882:Gingival Diseases / Q000209:etiology; D006801:Humans; D007962:Leukocytes / Q000276:immunology; D010510:Periodontal Diseases / Q000209:etiology* / Q000276:immunology / Q000382:microbiology