title: Comparison of posterior fixation alone and supplementation with posterolateral fusion in thoracolumbar burst fractures.
abstract: OBJECTIVE
  We compared the radiological and clinical outcomes between patients who underwent posterior fixation alone and supplemented with fusion following the onset of thoracolumbar burst fractures. In addition, we also evaluated the necessity of posterolateral fusion for patients treated with posterior pedicle screw fixation.
  
  
  METHODS
  From January 2007 to December 2009, 46 consecutive patients with thoracolumbar burst fracture were included in this study. On the basis of posterolateral fusion, we divided our patients into the non-fusion group and the fusion group. The radiological assessment was performed according to the Cobb's method, and results were obtained at immediately, 3, 6, 12 months after surgery. The clinical outcomes were evaluated using the modified Mcnab criteria at the final follow-up.
  
  
  RESULTS
  The demographic data and the mean follow-up period were similar between the two groups. Patients of both groups achieved satisfactory clinical outcomes. The mean loss of kyphosis correction showed that patients of both groups experienced loss of correction with no respect to whether they underwent the posterolateral fusion. There was no significant difference in the degree of loss of correction at any time points of the follow-up between the two groups. In addition, we also compared the effect of fixed levels (i.e., short versus long segment) on loss of correction between the two groups and there was no significant difference. There were no major complications postoperatively and during follow-up period.
  
  
  CONCLUSIONS
  We suggest that posterolateral fusion may be unnecessary for patients with thoracolumbar burst fractures who underwent posterior pedicle screw fixation.
authors.affiliation: Department of Neurosurgery, Cheongju St. Mary's Hospital, Cheongju, Korea.
authors.forename: Jong-Uk
authors.initials: JU
authors.lastname: Hwang
authors.forename: Jin-Woo
authors.initials: JW
authors.lastname: Hur
authors.forename: Jong-Won
authors.initials: JW
authors.lastname: Lee
authors.forename: Ki-Young
authors.initials: KY
authors.lastname: Kwon
authors.forename: Hyun-Koo
authors.initials: HK
authors.lastname: Lee
keywords: Loss of kyphosis correction; Posterior pedicle screw fixation; Posterolateral fusion; Thoracolumbar burst fracture