Abstract
We evaluated surgical result for lumbar spinal canal stenosis involved with wedging intervertebral disc at one level. These patients did not show lateral slipping or severe scoliosis. We used laminectomy or posterior lateral fusion (PLF) with pedicle screw fixation (PS) for the patients. We followed up 25 patients after surgery, and average follow up period was 2.3 years. JOA score improved from 11.0 to 21.2 in laminectomy group, and 12.1 to 25.2 in PLF group. The score in PLF group was significantly higher than that in laminectomy group. Three cases in laminectomy group show unsatisfactory results. X ray findings in 3 cases showed lateral instability of the intervertebal disc over 10 degree before surgery, and became worse to 14.6 degree after surgery. We concluded that in case of lumbar spinal canal stenosis involved with lateral instability of the wedging intervertebral disc with 10 degree and over, surgery with fusion is favorable to good results.
