Fig. 3

This patient had a history of AS for about 38 years, with severe kyphosis. He was admitted to the hospital due to back pain, without any obvious trauma. There was no spinal cord injury before surgery. a Preoperative X-ray shows an obvious severe kyphosis. b Preoperative CT shows obvious vertebral calcification and the fracture position is T10/11. c-d Postoperative X-ray shows satisfactory pedicle screw position and good resetting effect