Fig. 3
A 27-year-old man had old odontoid fracture caused by accident. a–d Preoperative X-ray showed fracture line was located at the bottom of odontoid (arrow), revealing an atlantoaxial instability. e–l X-ray obtained on the 1st day, the 3rd month, the 6th month, the 1st year, and the 2nd year postoperatively showed bone fusion