title: Radiographic evaluation of periapical status and prevalence of endodontic treatment in an adult Japanese population.
abstract: OBJECTIVE
  To determine the prevalence of periapical radiolucencies and endodontic treatment in an adult Japanese population.
  
  
  METHODS
  Periapical status and length of root fillings of 672 adult patients attending Okayama University Hospital of Dentistry were evaluated using full mouth intraoral radiographs.
  
  
  RESULTS
  Overall, 87% of the subjects had root-filled teeth, and 70% exhibited an apical radiolucency. Of the 16,232 teeth examined, 21% had been root-filled, and, of these, 40% exhibited an apical radiolucency. Root-filled teeth that were overfilled or that were mandibular incisors had the highest prevalence of apical radiolucencies.
  
  
  CONCLUSIONS
  The prevalence of root-filled teeth appears higher in this Japanese population than in Europe or America; however, the ratio of teeth with an apical radiolucency to root-filled teeth was within the range of that reported for other countries. Overfilled teeth and mandibular incisors are most likely to exhibit apical radiolucencies.
authors.affiliation: Department of Oral Health, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
authors.forename: Midori
authors.initials: M
authors.lastname: Tsuneishi
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Reiko
authors.initials: R
authors.lastname: Yamanaka
authors.forename: Naofumi
authors.initials: N
authors.lastname: Tamaki
authors.forename: Tomonori
authors.initials: T
authors.lastname: Sakamoto
authors.forename: Kohzoh
authors.initials: K
authors.lastname: Tsuji
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Watanabe
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D016009:Chi-Square Distribution; D005119:Extravasation of Diagnostic and Therapeutic Materials / Q000000981:diagnostic imaging / Q000453:epidemiology; D005260:Female; D006801:Humans; D007564:Japan / Q000453:epidemiology; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D018024:Peer Review, Health Care; D010485:Periapical Periodontitis / Q000000981:diagnostic imaging* / Q000453:epidemiology*; D010512:Periodontal Index; D015995:Prevalence; D011787:Quality of Health Care / Q000706:statistics & numerical data; D011859:Radiography; D012390:Root Canal Therapy / Q000592:standards* / Q000706:statistics & numerical data*