• H Zhao, G X Qiu, Y Zhao, J X Shen, Y P Wang, and J Lin.
• Department of Orthopedic Surgery, PUMC Hospital, CAMS, PUMC, Beijing 100730, China. zhaoh@csc.pumch.ac.cn
• Zhongguo Yi Xue Ke Xue Yuan Xue Bao. 2001 Dec 1; 23 (6): 651-3.

ObjectiveTo observe the preliminary clinical outcome of using a new instrumentation Diapason system and to introduce the characterization and surgical technique of this new system for treatment of unstable lumbar spinal stenosis.Methods16 patients with unstable spinal stenosis who were treated by decompression, posterolateral intertransverse arthrodesis and transpedicle instrumentation of Diapason system, were analyzed retrospectively.ResultsLower back pain (LBP) of 16 patients were significantly alleviated after surgery (scores of LBP before operation: 47.5 +/- 0.8; scores of LBP after operation: 31.9 +/- 2.3, P < 0.001). There was no implant failure, no early or later infection and no neurological complications in 16 patients at an average of 6.2-month follow-ups. No pseudoarthrosis was observed on roentgenography.ConclusionOur short-term follow-up and limited cases study showed satisfactory preliminary result of treating unstable lumbar spinal stenosis with Diapason internal fixation.

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