230 patients with moderate to severe lumbar spinal stenosis were randomized to undergo open microsurgical decompression either with or without an interlaminar stabilization (ILS) system. The purpose of this study was to determine if the addition of an ILS system was associated with a significantly improved rate of overall success (improvement in 2/3 Zurich Claudication Questionnairecompontents and a 20mm improvement in VAS back pain) and clinical outcomes measures after 24 months. Findings suggested that the D+ILS group (open microsurgical decompression with a Coflex® interlaminar stabilization system) showed a trend towards a significant increase in overall success rates when measuring pain and function clinical parameters between groups.
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