Life Spine, Inc., a medical device company that designs, develops, manufactures, and markets products for the surgical treatment of spinal disorders, announced today their 510k for ARx SAI (Sacral Alar Iliac) Spinal Fixation System was approved. ARx SAI has expanded its compatibility clearance and is now approved for use with compatible pedicle screws with 5.5mm or 6.0mm posterior rods made from either titanium alloys or cobalt chrome, including those from competitor systems.*