A Prospective Analysis of the Efficacy of Allosync Expand and Autograft Bone Graft in Open Lumbar Spinal Fusion

Inclusion Criteria

• •1. At least 22years of age at the time of consent
• •2. Subject must have a documented diagnosis of spondylolisthesis up to Grade I. and have confirmed back and/or radicular pain with associated spinal stenosis as documented by conditions such as:
• •1. Instability as defined by \>3mm translation or \>5 degree angulation
• •2. Osteophyte formation of facet joints or vertebral endplates
• •3. Subject presents with one or more of the following:
• •1. Radiculopathy
• •2. Sensory deficit
• •3. Motor weakness
• •4. Reflex changes
• •4. Subject requires lumbar posterolateral arthrodesis at 1-3 contiguous levels (L1-S1).
• •5. The number of levels decompressed must equal the number of levels fused.
• •6. Subject must have been unresponsive to conservative care for at least 3 months prior to fusion surgery.
• •7. Subject must be willing and able to sign an informed consent document.
• •8. Subject must be willing and able to return for all follow-up visits, agree to participate in postoperative clinical and radiographic evaluations and comply with the required study regimen.