title: Erosion of the teeth: prevalence and distribution in a group of Danish school children.
abstract: OBJECTIVE
  This was to describe the prevalence of eroded tooth surfaces among 15-17 years old school children in a Danish city and to assess the reliability of diagnosis of erosions performed by 9 clinical examiners.
  
  
  METHODS
  During a calendar year (2000) a total of 558 children in 4 public schools in Aarhus were examined by 7 examiners and 2 coordinators using the following criteria: intact; erosion confined to enamel; erosion exposing less than half of the dentine, and erosion involving more dentine than half the surface.
  
  
  RESULTS
  It was found that 14.0% (95% CL: 11.3%; 17.1%) of the children had more than 3 surfaces eroded. In the maxilla lingual surfaces were more affected than the facial surfaces. No lesions exposing more than half of the dentine were observed. Despite a careful calibration, including a thorough discussion of the criteria and the experience gained during the study, a substantial inter examiner difference in diagnosis was found.
  
  
  CONCLUSIONS
  The most frequently eroded sites were the lingual surfaces of maxillary incisors; the identification of eroded areas is often difficult and subject to a low inter examiner reliability.
authors.affiliation: Department of Dental Pathology, Operative Dentistry and Endodontics, Royal Dental College, Faculty of Health Sciences, University of Aarhus, Denmark. joost@odont.au.dk
authors.forename: M J
authors.initials: MJ
authors.lastname: Larsen
authors.forename: S
authors.initials: S
authors.lastname: Poulsen
authors.forename: I
authors.initials: I
authors.lastname: Hansen
mesh_terms: D000293:Adolescent; D003718:Denmark / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D015588:Observer Variation; D015995:Prevalence; D015203:Reproducibility of Results; D012737:Sex Factors; D014077:Tooth Erosion / Q000175:diagnosis / Q000453:epidemiology*