The spinal ligaments help stabilize the spinal column when in motion, which is why it is important to preserve the sup-porting ligamentous structures as much as possible during surgery. Most spinous process plates require removal of both the interspinous ligament and the supraspinous liga-ment for proper implantation. The PercLIF surgical tech-nique completely preserves the supraspinous ligament and only partially removes the interspinous ligament the size of the implant.