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Abstract
The comparative effectiveness of performing instrumented (rigid pedicle screws affixed
to titanium alloy rods) lumbar spinal fusion in addition to decompressive laminectomy
in patients with symptomatic lumbar grade I degenerative spondylolisthesis with spinal
stenosis is unknown.
The efficacy of fusion surgery in addition to decompression surgery in patients who have lumbar spinal stenosis, with or without degenerative spondylolisthesis, has not been substantiated in controlled trials.