title: Has the prevalence of periodontitis changed during the last 30 years?
abstract: OBJECTIVE
  This paper reviews global trends in the change in prevalence of periodontitis over the last 30 years.
  
  
  METHODS
  The epidemiology of periodontal disease is briefly reviewed together with the current classification system and the clinical and radiographic diagnostic methodology in periodontal disease.
  
  
  RESULTS
  This review identifies the very limited number of studies that provide prevalence data over time, and this data is discussed in comparison with those stemming from a few corresponding studies from countries outside Europe.
  
  
  CONCLUSIONS
  The data indicate a possible trend of a lower prevalence of periodontitis in recent years.
authors: School of Health Science, Jönköping University, Jönköping, Sweden. Anders.Hugoson@hhj.hj.se
authors: Anders
authors: A
authors: Hugoson
authors: Ola
authors: O
authors: Norderyd
mesh_terms: D016301:Alveolar Bone Loss / Q000453:epidemiology; D055113:Chronic Periodontitis / Q000453:epidemiology; D005060:Europe / Q000453:epidemiology; D005891:Gingivitis / Q000453:epidemiology; D014943:Global Health; D006801:Humans; D017622:Periodontal Attachment Loss / Q000453:epidemiology; D010518:Periodontitis / Q000145:classification / Q000453:epidemiology*; D015995:Prevalence