title: Incidence and distribution of root canal treatment in the dentition among a Jordanian sub population.
abstract: OBJECTIVE
  To determine and compare the incidence of endodontically treated teeth in the maxilla and mandible, and to present the frequency of endodontic treatment for each tooth in the dentition in a group of the Jordanian population; then to compare these results with previously published surveys.
  
  
  METHODS
  A total of 1,404 root canal treated teeth were examined clinically and radiographically.
  
  
  RESULTS
  Most teeth were treated in a one visit procedure (40.1%). The results showed that 77.7% of the treated teeth were in the maxilla and 22.3% were in the mandible. Posterior teeth accounted for 39.0% of all treated teeth, among which, 20.3% were molars. The most frequently treated tooth was the maxillary central incisor tooth (39.6%), with the maxillary lateral incisor second (10.1%). Furthermore, the maxillary incisors alone accounted for almost half (49.7%) of the cases. The maxillary first molar was the third most frequently treated tooth (8.2%) with the mandibular first molar at 7.5%. The lowest frequency of treatment was for mandibular lateral incisors and canines which made up only 1.1% and 1.9% respectively.
  
  
  CONCLUSIONS
  Comparison with previously published surveys revealed a lower percentage of molar endodontics than in other surveys.
authors.affiliation: Royal Medical Services, Irbid, Jordan. anegrish@yahoo.com
authors.forename: A R S
authors.initials: AR
authors.lastname: Al-Negrish
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D016009:Chi-Square Distribution; D002648:Child; D003481:Cuspid / Q000473:pathology; D005260:Female; D006801:Humans; D015994:Incidence; D007180:Incisor / Q000473:pathology; D007597:Jordan / Q000453:epidemiology; D008297:Male; D008334:Mandible; D008437:Maxilla; D008875:Middle Aged; D008963:Molar / Q000473:pathology; D008964:Molar, Third / Q000473:pathology; D012390:Root Canal Therapy / Q000706:statistics & numerical data*; D012737:Sex Factors; D019553:Tooth, Nonvital / Q000453:epidemiology*