title: Periodontal disease: Part I--Biological mechanisms and risk factors.
authors.forename: G
authors.initials: G
authors.lastname: Bussac
mesh_terms: D006801:Humans; D010510:Periodontal Diseases / Q000453:epidemiology / Q000209:etiology* / Q000473:pathology*; D010518:Periodontitis / Q000209:etiology / Q000473:pathology; D012307:Risk Factors; D014481:United States / Q000453:epidemiology