title: Frequency and distribution of root filled teeth and apical periodontitis in a Greek population.
abstract: OBJECTIVE
  To investigate the prevalence of root filled teeth and apical periodontitis (AP) in a Greek population.
  
  
  METHODS
  A random sample of 320 patients who required full mouth periapical radiographic examination as a part of diagnostic and planning procedures were included. The age of the patients ranged from 16 to 77 years. A total of 7664 teeth were assessed and the frequency of root filled teeth and periapical status was recorded. Two observers evaluated the radiographs under standardized conditions. AP was defined as distinct periapical radiolucency or widening of the periodontal ligament space exceeding two times the normal width. Statistical evaluation of differences in proportions between groups was performed using random effects logistic regression models.
  
  
  RESULTS
  The periapical status of 286 (3.7%) teeth was impossible to evaluate because of radiographic faults; these teeth were excluded from further analysis. A total of 1040 (13.6%) teeth had radiographic signs of AP and 680 (9.2%) teeth had been root filled. Of the root filled teeth, 408 (60.0%) had AP. There was no difference in the number of root filled teeth between males and females; the prevalence of root filled teeth increased with age. Significantly more molars (13.1%) and premolars (11.9%) than anterior teeth (5.8%) had been root filled (P < 0.001). The prevalence of AP was significantly higher (P < 0.001) in molars (23.9%) and premolars (14.0%) than anterior teeth (9.4%).
  
  
  CONCLUSIONS
  The prevalence of AP and the frequency of root filled teeth with AP in this Greek population were higher than those found in many other European countries. The frequency of root filled teeth was comparable with findings in other epidemiological studies.
authors.affiliation: Department of Endodontics, Dental School, University of Athens, Athens, Greece. mgeorgop@dent.uoa.gr
authors.forename: M K
authors.initials: MK
authors.lastname: Georgopoulou
authors.forename: A P
authors.initials: AP
authors.lastname: Spanaki-Voreadi
authors.forename: N
authors.initials: N
authors.lastname: Pantazis
authors.forename: E G
authors.initials: EG
authors.lastname: Kontakiotis
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003430:Cross-Sectional Studies; D003793:Dental Restoration, Permanent / Q000706:statistics & numerical data; D005260:Female; D006115:Greece / Q000453:epidemiology; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D010485:Periapical Periodontitis / Q000453:epidemiology*; D015995:Prevalence; D019553:Tooth, Nonvital / Q000453:epidemiology*