Under general anesthesia with the patient lying on prone position, the patient will be monitor nerve function with intraoperative neuromonitoring. The surgeon makes a midline incision on back to expose the spine. The spine will be scan with O-arm navigator and images will transfer to robot computer. Planning for pedicle screws will be done with the software for the most accuracy of pedicle screw placement. Surgeon will perform surgery with the robotic guidance along with surgical planning and with real time navigation of O-arm navigator. After all pedicle screws are placed, the spine will be realigning into designed position. Spinal fusion will be done with bone graft. Surgery usually takes about 4 to 6 hours.