Comparative Study of Lumbar Lordosis after Posterior Lumbar Instrumentation Using Wilson Frame and Jackson Table |
Sung-Ho Park, M.D., Sung-Woo Roh, M.D., Sang-Ryong Jeon, M.D., and Seung-Chul Rhim, M.D. |
Department of Neurosurgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea |
Comparative Study of Lumbar Lordosis after Posterior Lumbar Instrumentation Using Wilson Frame and Jackson Table |
Sung-Ho Park, M.D., Sung-Woo Roh, M.D., Sang-Ryong Jeon, M.D., and Seung-Chul Rhim, M.D. |
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Abstract |
Object: This study performed was to document changes in total lumbar lordosis, unisegmental lordosis, and sacral slope between preoperation, intraoperation, and postoperation using two different spinal frames(Jackson table and Wilson frame).
Method: Fifty patients were reviewed retrospectively. The patients were divided into two groups, one using the Wilson frame(group 1) and the other using the Jackson table(group 2). Total lumbar lordosis, and segmental lordosis, sacral slope were measured in preoperative standing radiographs and intraoperative lateral radiographs after positioning, postoperative radiographs on two different tables. And according to surgery levels, the two group were compared with total lumbar lordosis, segmental lordosis, and sacral slope in preoperation, intraoperation, and postoperation.
Results: In group 1 patients who underwent L4-5-S1 posterior spinal fusion, postoperative total lumbar lordosis and sacral slope was not restored to preoperative lordotic condition while in group 2, patients who underwent L4-5-S1 posterior spinal fusion, there was no marked changes between preoperation and intraoperation, postoperation(p<0.05). In group 1, the L4-5, L5-S1 intraoperative segmental lordosis remarkably decreased when compared to other level. But in group 2, intraoperative segmental lordosis showed no change at all levels when compared with preoperative segmental lordosis.
Conclusion: For long level spinal fusion including the sacrum, in particular, careful consideration should be given to type of spinal frame used. |
Keywords:
Lordosis |
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