title: Traumatic thoracolumbar facet instability: characteristic imaging findings.
abstract: OBJECTIVE
  To review imaging patterns and injury mechanisms in patients with thoracolumbar facet instability (TFI).
  
  
  METHODS
  Imaging studies for thoracolumbar osseous injuries over a 2-year period were reviewed. Imaging findings, injury pattern and reported mechanism of injury were established for patients with TFI.
  
  
  METHODS
  One hundred and ten patients with thoracolumbar acute, osseous injuries were studied.
  
  
  RESULTS
  Eleven of 68 (16.2%) unstable thoracolumbar injuries demonstrated TFI. Seven (64%) of the eleven TFI patients were unrestrained occupants in a motor vehicle accident (MVA) and the remainder were involved in injuries dominated by blunt impact to the back. Only two (18%) had serious, permanent neurological deficits.
  
  
  CONCLUSIONS
  TFI is a common injury pattern, particularly for unrestrained occupants in MVAs. Characteristic radiographic, CT and MRI findings are presented and correlated with the injury mechanism and clinical findings.
authors.affiliation: Department of Radiology, University of Arizona Health Sciences, Tucson 85724, USA.
authors.forename: P J
authors.initials: PJ
authors.lastname: Lund
authors.forename: J T
authors.initials: JT
authors.lastname: Ruth
authors.forename: R
authors.initials: R
authors.lastname: Dzioba
authors.forename: R
authors.initials: R
authors.lastname: Carmody
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007593:Joint Instability / Q000000981:diagnostic imaging / Q000473:pathology*; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging / Q000293:injuries* / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009104:Multiple Trauma; D011859:Radiography; D013124:Spinal Injuries / Q000175:diagnosis / Q000000981:diagnostic imaging*; D013904:Thoracic Vertebrae / Q000000981:diagnostic imaging / Q000293:injuries* / Q000473:pathology