Fig. 5From: Radiographic and clinical outcomes of C1-C2 intra-articular screw fixation in patients with atlantoaxial subluxationA 63-year-old female with rheumatoid arthritis and vertical subluxation. a Lateral view on a preoperative plain radiograph. The A1-A2 height was 30.9Â mm. b Preoperative MRI. Vertical subluxation was noted. c Lateral view on a postoperative plain radiograph. The A1-A2 height had increased to 36.9Â mmBack to article page