Our two groups of patients were similar for comorbidity, number of arthodesis levels, fusion zone, extent and site of associated radicular release, lumbar lordosis, slope of the sacrum, global spinal mobility, and angular anteroposterior intersegmentary mobility of the different levels of the fusion zone, and interertebral sliding (site, degree, type, ante- or retrolisthesis). Radiological and clinical assessment obtained preoperatively and at 6, 12, and 24 months postoperatively were available for all 62 patients. These 31 patients were matched for age, sex, smoking habits, and extent of the fusion with 31 other patients who had an instrumented arthrodesis. Among a total of 98 operated patients, 31 had arthrodesis without instrumentation.
We recaIIed for assessment patients who had undergone surgery for stenosis of the lumbar spine and who had a posterolateral lumbar or lumbosacral arthodesis in addition to the spinal decompression. We also tried to isolate factors predictive of nonunion and the effect of nonunion on the final outcome.
The main objective of this work was to determine the impact of osteosynthesis for posterolateral arthodesis on bone consolidation.
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