Lumbar spinal canal stenosis is a common cause of back and leg pain which occurs as the lumbar spinal canal narrows. The current surgical treatment for many patients with spinal stenosis is surgical decompression and spinal fusion with instrumentation. However there are several drawbacks associated with fusion surgeries including degenerative effect at segments adjacent to the fusion in long run [1,2]. Pedicle lengthening device is a new technology which is designed to be applied for treatment of spinal stenosis and replace the traditional fusion techniques.

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