Journal of Korean Neurosurgical Society

  • 제56권3호
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  • Pages.230-236
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  • 2014
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  • 2005-3711(pISSN)
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  • 1598-7876(eISSN)
대한신경외과학회 (The Korean Neurosurgical Society)
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Predictive Factors for a Kyphosis Recurrence Following Short-Segment Pedicle Screw Fixation Including Fractured Vertebral Body in Unstable Thoracolumbar Burst Fractures

  • Kim, Gun-Woo (Department of Neurosurgery, Chonnam National University Medical School & Research Institute of Medical Sciences) ;
  • Jang, Jae-Won (Department of Neurosurgery, Chonnam National University Medical School & Research Institute of Medical Sciences) ;
  • Hur, Hyuk (Department of Neurosurgery, Chonnam National University Medical School & Research Institute of Medical Sciences) ;
  • Lee, Jung-Kil (Department of Neurosurgery, Chonnam National University Medical School & Research Institute of Medical Sciences) ;
  • Kim, Jae-Hyoo (Department of Neurosurgery, Chonnam National University Medical School & Research Institute of Medical Sciences) ;
  • Kim, Soo-Han (Department of Neurosurgery, Chonnam National University Medical School & Research Institute of Medical Sciences)
  • 투고 : 2014.01.17
  • 심사 : 2014.09.18
  • 발행 : 2014.09.28
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초록

Objective : The technique of short segment pedicle screw fixation (SSPSF) has been widely used for stabilization in thoracolumbar burst fractures (TLBFs), but some studies reported high rate of kyphosis recurrence or hardware failure. This study was to evaluate the results of SSPSF including fractured level and to find the risk factors concerned with the kyphosis recurrence in TLBFs. Methods : This study included 42 patients, including 25 males and 17 females, who underwent SSPSF for stabilization of TLBFs between January 2003 and December 2010. For radiologic assessments, Cobb angle (CA), vertebral wedge angle (VWA), vertebral body compression ratio (VBCR), and difference between VWA and Cobb angle (DbVC) were measured. The relationships between kyphosis recurrence and radiologic parameters or demographic features were investigated. Frankel classification and low back outcome score (LBOS) were used for assessment of clinical outcomes. Results : The mean follow-up period was 38.6 months. CA, VWA, and VBCR were improved after SSPSF, and these parameters were well maintained at the final follow-up with minimal degree of correction loss. Kyphosis recurrence showed a significant increase in patients with Denis burst type A, load-sharing classification (LSC) score >6 or DbVC >6 (p<0.05). There were no patients who worsened to clinical outcome, and there was no significant correlation between kyphosis recurrence and clinical outcome in this series. Conclusion : SSPSF including the fractured vertebra is an effective surgical method for restoration and maintenance of vertebral column stability in TLBFs. However, kyphosis recurrence was significantly associated with Denis burst type A fracture, LSC score >6, or DbVC >6.

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참고문헌

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