Seven years follow-up for total lumbar facet joint replacement (TOPS) in the management of lumbar spinal stenosis and XXXX .

@entity1 @entity612 @entity613 @entity179 @entity158 @entity717
PURPOSE: To evaluate the feasibility and clinical improvement of a total posterior arthroplasty system in the surgical management of lumbar @entity179 and or @entity612 . METHODS: During a 1-year period (June 2006 to July 2007), ten @entity1 were enrolled in a non-randomized prospective clinical study. The primary indication was @entity613 due to @entity612 with single-level @entity179 . @entity1 were evaluated with X-rays and MRI scans, visual analog scale (VAS) for back and leg @entity158 , the @entity717 questionnaire, and the SF-36 health survey preoperatively, at 6  weeks, 3  months and 6  months and at 1, 2, 3 and 7  years postoperatively. RESULTS: The VAS score for back @entity158 dropped from 56.2 preoperatively to 12.5 at 6  weeks and 19 at 7  years follow-up. The VAS score for worse leg @entity158 dropped from 83.5 before surgery to 13 at 6  weeks and 8.8 at 7  years follow-up. The ODI dropped from 49.1 preoperatively to 13.5 at 6  weeks and 7.8 at 7  years follow-up. MRI examination at 7  years after surgery did not demonstrate stenosis adjacent to the stabilized segment. Spondylolisthesis did not progress in any of the cases. One @entity1 had a symptomatic L3-L4 far lateral disc herniation 5  years after surgery whose symptoms resolved with non-operative treatment. In one @entity1 , conversion to posterolateral fusion was performed due to an early device malfunction. CONCLUSION: In @entity1 with @entity612 and @entity179 , decompression and posterior arthroplasty with the TOPS System can maintain clinical improvement and radiologic stability over time.
