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| LUO Jianping,CUI Liyang,ZHANG Xinsheng.Clinical outcomes of Wallis interspinous dynamic stabilization for lumbar degenerative disc disease[J].Chinese Journal of Spine and Spinal Cord,2013,(10):879-885. |
| Clinical outcomes of Wallis interspinous dynamic stabilization for lumbar degenerative disc disease |
| Received:December 04, 2012 Revised:March 15, 2013 |
| English Keywords:Lumbar degenerative disc disease Interspinous dynamic stabilization system ROM Radiographs |
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| English Abstract: |
| 【Abstract】 Objectives: To explore a mean of 3.5-year clinical results of Wallis interspinous dynamic stabilization for lumbar degenerative disc disease. Methods: From July 2008 to July 2010, a retrospective analysis of 79 patients with lumbar degenerative disc disease who underwent one-level placement of the Wallis interspinous dynamic stabilization system was carried out, 75 of whom completed a mean of 3.5-year follow-up, Low back pain VAS, leg pain VAS, JOA and ODI score were measured at pre-operation, 3 months post-operation and final follow-up. The segmental lordosis and the cranial and caudal adjacent segment were evaluated by X-ray to understand their range of motion(ROM) and disc height, Pfirrmann′s classification under MRI was used to evaluate the disc degeneration. The intraoperative and postoperative complications of all patients were noted. Results: 79 cases with one-level Wallis placement were recorded, 75 of whom completed a mean of 42.97±2.74 months follow-up(range, 28-49 months), and 4 lost follow-up. The preoperative symptoms of all patients relieved after operation. No complication such as recurrence or prosthesis displacement was noted. There were statistical differences in low back VAS score, leg VAS score, JOA score and ODI score at 3 months post-operation and final follow-up when compared with the preoperative data(P<0.001) and the statistical difference existed between 3 months post-operation and final follow-up. At final follow-up, significant difference was noted as for the extension Cobb angle and ROM of the operated segment when compared with the pre-operation(P<0.001), while those in the cranial and caudal adjacent segments were bigger than the preoperative ones. There was no statistical difference in the lateral and flexion Cobb angle and ROM of the operated level as well as the cranial and caudal adjacent segment when compared with the pre-operation(P>0.05). At final follow-up, disc height of the operated segment was higher than the pre-operation(P<0.001), while there was no statistical difference as for the cranial and caudal adjacent segment(P>0.05). Pfirrmann′s classification at the pre-operation and final follow-up showed total improvement, no change, and deteriorate rate of 45.3%, 52.1% and 2.6% respectively, while there was no significant difference in the cranial and caudal adjacent segment when compared with those at pre-operation, some cases changed from grade Ⅲ to grade Ⅱ. Conclusions: Wallis interspinous dynamic stabilization system is an effective surgical option for the treatment of lumbar degenerative disc disease at least in a mean of 3.5-year follow-up. |
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