title: Risk factors in periodontology: a conceptual framework.
abstract: The definition and assessment of risk factors, risk indicators and predisposing factors are of paramount importance in the understanding of the pathogenesis of periodontitis, as well as in its prevention and treatment. This article aims to emphasize the concepts of causal chains and the causal network of risk factors in periodontitis.
  
  
  
  This is a narrative review focusing on two main questions: (1) what is a risk in periodontology? and (2) how can a risk be assessed?
  
  
  
  The probability of the occurrence of an adverse outcome following exposure is not sufficient to analyse the impact of a risk factor on the disease. A network model for the pathway of risk factors in the pathogenesis of periodontitis is described. This article emphasizes the concepts of causal chains and the causal network of risk factors in periodontitis.
  
  
  
  Chronic periodontal diseases are among the most complex non-communicable diseases. A conceptual framework intended to clarify the relationship between risk and causality may improve the understanding of the underlying mechanisms of chronic diseases. The proposed causal network may provide a model to assess the role of risk factors in periodontitis.
authors.affiliation: Department of Periodontology, Service of Odontology, Rothschild Hospital, AP-HP, Paris 7-Denis Diderot University, U.F.R. of Odontology, Paris, France.|EA 2496, Paris 5-Descartes University, U.F.R. of Odontology, Paris, France.
authors.forename: Philippe
authors.initials: P
authors.lastname: Bouchard
authors.affiliation: Department of Periodontology, Service of Odontology, Rothschild Hospital, AP-HP, Paris 7-Denis Diderot University, U.F.R. of Odontology, Paris, France.|INSERM, U1018, Villejuif, France.
authors.forename: Maria Clotilde
authors.initials: MC
authors.lastname: Carra
authors.affiliation: Department of Periodontology, Service of Odontology, Rothschild Hospital, AP-HP, Paris 7-Denis Diderot University, U.F.R. of Odontology, Paris, France.
authors.forename: Adrien
authors.initials: A
authors.lastname: Boillot
authors.affiliation: Department of Periodontology, Service of Odontology, Rothschild Hospital, AP-HP, Paris 7-Denis Diderot University, U.F.R. of Odontology, Paris, France.
authors.forename: Francis
authors.initials: F
authors.lastname: Mora
authors.affiliation: Department of Periodontology, Service of Odontology, Rothschild Hospital, AP-HP, Paris 7-Denis Diderot University, U.F.R. of Odontology, Paris, France.|EA 2496, Paris 5-Descartes University, U.F.R. of Odontology, Paris, France.
authors.forename: Hélène
authors.initials: H
authors.lastname: Rangé
mesh_terms: D015984:Causality; D006801:Humans; D010518:Periodontitis / Q000453:epidemiology / Q000209:etiology*; D018570:Risk Assessment; D012307:Risk Factors
keywords: health determinants; pathogenesis; periodontitis; periodontology; risk factors