Journal of Korean Neurosurgical Society

The Korean Neurosurgical Society (대한신경외과학회)
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What are the Differences in Outcome among Various Fusion Methods of the Lumbar Spine?

  • Kang, Suk-Hyung (Department of Neurosurgery, College of Medicine, Chung-Ang University) ;
  • Kim, Young-Baeg (Department of Neurosurgery, College of Medicine, Chung-Ang University) ;
  • Park, Seung-Won (Department of Neurosurgery, College of Medicine, Chung-Ang University) ;
  • Hong, Hyun-Jong (Department of Neurosurgery, College of Medicine, Chung-Ang University) ;
  • Min, Byung-Kook (Department of Neurosurgery, College of Medicine, Chung-Ang University)
  • Published : 2005.01.31
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Abstract

Objective: For Posterior lumbar interbody fusion(PLIF) various cages or iliac bone dowels are used with or without pedicle screw fixation(PSF). To evaluate and compare the clinical and radiological results of different fusion methods, we intend to verify the effect of added PSF on PLIF, the effect of bone cages and several factors which are thought to be related with the postoperative prognosis. Methods: One hundred and ninety seven patients with lumbar spinal stenosis and instability or spondylolisthesis underwent various fusion operations from May 1993 to May 2003. The patients were divided into five groups, group A (PLIF with autologous bone dowels, N=24), group B (PLIF with bone cages, N=13), group C (PLIF with bone dowels and PSF, N=37), group D (PLIF with bone cages and PSF, N=30) and group E (PSF with intertransverse bone graft, N=93) for comparison and analyzed for the outcome and fusion rate. Results: Outcome was not significantly different among the five groups. In intervertebral height (IVH) changes between pre- and post-operation, Group B ($2.42{\pm}2.20mm$) was better than Group A ($-1.33{\pm}2.05mm$). But in the Group C, D and E, the IVH changes were not different statistically. Fusion rate of group C, D was higher than that of Group A and B. But the intervertebral height(IVH) increased significantly in group B($2.42{\pm}2.20mm$). Fusion rate of group C and D were higher than that of group A and D. Conclusion: Intervertebral cages are superior to autologous iliac bone dowels for maintaining intervertebral height in PLIF. The additional pedicle screw fixation seems to stabilize the graft and improve fusion rates.

Keywords

References

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