Posterior Lumbar Interbody Fusion Results With Supercritical CO Processed Bone Allografts in a 2 Series of 85 Consecutive Patients

Purpose:The aim of this study was to report our experience in lumbar fusion cases using the Supercritical CO2 processed bone allografts.Materials and Methods: 85 patients underwent 1 or 2 level posterior lumbar fusion using bone allografts processed by Supercritical CO2 extraction combined with chemical viral inactivation.Radiographic evaluation was performed at immediate postoperative, 3 months, 6 months and at a mean 12.4 months post-surgery combined with a CT including fine coronal tomography.Results: No patient had surgery-related spinal nerve injury, one dural laceration was stitched without clinical consequences.The radiological evaluation of the 92 operated levels at last follow-up showed that 88 of these levels (95.7%) were fused.Four of the operated levels (4.3%) were non-fused and considered to have complications.Conclusion: Within the limitations of this study, the use of supercritical CO2 processed bone allograft resulted in good clinical outcome results and fusion rate in lumbar surgeries.