title: Treatment of unstable thoracolumbar and lumbar spine injuries using Cotrel-Dubousset instrumentation.
abstract: METHODS
  In this prospective study, the results of treating unstable thoracolumbar and lumbar injuries with Cotrel-Dubousset instrumentation were investigated.
  
  
  OBJECTIVE
  To determine the pain and work status of the patients, to evaluate neurologic status, and to assess the efficacy of instrumentation in the short term.
  
  
  BACKGROUND
  Short-segment pedicle screw construct is the method of choice for reduction and stabilization of unstable thoracolumbar spinal injuries. Many investigators have recently reported a high rate of instrument failure. In this study, the use of segmental transpedicular fixation two levels above the kyphosis decreased instrument failure and sagittal collapse.
  
  
  METHODS
  Thirty patients, who had unstable thoracolumbar and lumbar spinal injuries, underwent application from a posterior approach of Cotrel-Dubousset instrumentation two levels above and one below at the thoracolumbar junction and short segment fixation in the lumbar area. Radiologic parameters were evaluated before and after surgery.
  
  
  RESULTS
  The mean follow up was 31 months (range, 25-49) months. There were statistically significant differences between the pre- and postoperative values in all radiologic parameters. Neurologic status improved in 70% of the patients, with a mean Frankel grade of 1.3 grades.
  
  
  CONCLUSIONS
  Cotrel-Dubousset instrumentation provided spinal stability in unstable injuries, forming a rigid construct and restoring physiologic thoracolumbar and lumbar postural contours because of its highly corrective effect in the sagittal profile with no loss of correction.
authors.affiliation: University Hospital of Heraklion, Crete, Greece.
authors.forename: P G
authors.initials: PG
authors.lastname: Katonis
authors.forename: G M
authors.initials: GM
authors.lastname: Kontakis
authors.forename: G A
authors.initials: GA
authors.lastname: Loupasis
authors.forename: A C
authors.initials: AC
authors.lastname: Aligizakis
authors.forename: J I
authors.initials: JI
authors.lastname: Christoforakis
authors.forename: E G
authors.initials: EG
authors.lastname: Velivassakis
mesh_terms: D000328:Adult; D001858:Bone Nails; D001863:Bone Screws; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D016268:Internal Fixators; D008159:Lumbar Vertebrae / Q000293:injuries*; D008297:Male; D010147:Pain Measurement; D011446:Prospective Studies; D016103:Spinal Fractures / Q000601:surgery*; D013123:Spinal Fusion / Q000295:instrumentation*; D013904:Thoracic Vertebrae / Q000293:injuries*; D013997:Time Factors; D014940:Work Schedule Tolerance