title: Prevalence and associated periodontal status of teeth with root perforation: a retrospective study of 2,002 patients' medical records.
abstract: BACKGROUND
  Various procedures along the course of an endodontic treatment may lead to perforations. The prognosis of perforated teeth depends on perforation location, perforation size, and time from occurrence. The aim of this study was to retrospectively evaluate the prevalence of root perforations and associated pathological changes in the adjacent periodontal tissues.
  
  
  METHODS
  Full periapical status surveys and medical records of 2,002 patients with a total of 56,175 teeth were evaluated.
  
  
  RESULTS
  Of a total of 5,048 root canal-treated teeth, 116 root perforations were identified in 101 patients. Associated pathological changes in the adjacent periodontal tissues were identified in 81 teeth with perforations. The patient's age, perforation location and size, and tooth type significantly influenced the occurrence of perforation associated periodontal damage.
  
  
  CONCLUSIONS
  When a perforation occurs, the main treatment goal is to prevent long-lasting injury to the periodontium. Better knowledge of the prevalence of perforations and their possible predictors may assist the clinician in the prevention and treatment of iatrogenic root perforations.
authors.affiliation: Department of Endodontology, Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel. dr.tsesis@gmail.com
authors.forename: Igor
authors.initials: I
authors.lastname: Tsesis
authors.forename: Ester
authors.initials: E
authors.lastname: Rosenberg
authors.forename: Vadim
authors.initials: V
authors.lastname: Faivishevsky
authors.forename: Anda
authors.initials: A
authors.lastname: Kfir
authors.forename: Menahem
authors.initials: M
authors.lastname: Katz
authors.forename: Eyal
authors.initials: E
authors.lastname: Rosen
mesh_terms: D000328:Adult; D003762:Dental Instruments / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007049:Iatrogenic Disease / Q000453:epidemiology; D008297:Male; D010510:Periodontal Diseases / Q000209:etiology; D015995:Prevalence; D012189:Retrospective Studies; D018915:Root Canal Preparation / Q000009:adverse effects* / Q000295:instrumentation; D018677:Tooth Injuries / Q000150:complications / Q000453:epidemiology* / Q000209:etiology*; D014092:Tooth Root / Q000293:injuries*