Interspinous process device versus standard conventional surgical decompression for lumbar spinal stenosis: randomised controlled trial

STUDY QUESTION: Is interspinous process device implantation more effective in the short term (eight weeks) than conventional surgical decompression for patients with intermittent neurogenic claudication due to lumbar spinal stenosis? SUMMARY ANSWER: The use of interspinous implants did not result in a better outcome than conventional decompression, but the reoperation rate was significantly higher. WHAT IS KNOWN AND WHAT THIS PAPER ADDS: Bony decompression and treatment with interspinous process devices are superior to conservative and non-surgical treatment for intermittent neurogenic claudication due to lumbar spinal stenosis. Interspinous implants surgery is not superior to bony decompression, and the reoperation rate is significantly higher.