Fig. 4From: Interspinous process stabilization with Rocker via unilateral approach versus X-Stop via bilateral approach for lumbar spinal stenosis: a comparative studyIntraoperative photographs displays that Rocker has been fixed between spinous process (a). Anterior to posterior radiographic image shows a properly placed Rocker (b). Anterior and posterior radiographic image demonstrates that Rocker dislocated to the paraspinous site (c)Back to article page