title: Radiographic features of vertically fractured, endodontically treated maxillary premolars.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the most frequent radiographic appearance of bony lesions associated with vertically fractured roots of endodontically treated maxillary premolars.
  
  
  METHODS
  The radiographic features of 102 endodontically treated teeth and their periradicular areas (51 with and 51 without vertically fractured roots) were evaluated and compared.
  
  
  RESULTS
  The predominant appearance of the periradicular area in the teeth with vertically fractured roots was the "halo" lesion (57%); by contrast, in the non-vertically fractured roots group, a "periapical" radiolucent lesion was most frequently found (55%). Angular bone loss (14%) and periodontal radiolucency (14%) were also typical radiolucent lesions in the vertically fractured teeth.
  
  
  CONCLUSIONS
  "Halo" lesion, perilateral radiolucency, and angular resorption of the crestal bone, combined with diffuse or defined but not corticated borders, indicated a high probability of vertical root fracture in maxillary premolars.
authors.affiliation: Department of Endodontology, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Israel.
authors.forename: A
authors.initials: A
authors.lastname: Tamse
authors.forename: Z
authors.initials: Z
authors.lastname: Fuss
authors.forename: J
authors.initials: J
authors.lastname: Lustig
authors.forename: Y
authors.initials: Y
authors.lastname: Ganor
authors.forename: I
authors.initials: I
authors.lastname: Kaffe
mesh_terms: D001641:Bicuspid / Q000000981:diagnostic imaging / Q000293:injuries*; D019232:Dental Restoration Failure; D006801:Humans; D008437:Maxilla; D011859:Radiography; D014082:Tooth Fractures / Q000000981:diagnostic imaging*; D014092:Tooth Root / Q000293:injuries; D019553:Tooth, Nonvital / Q000000981:diagnostic imaging*