Fig. 2.

A 61-year-old man suffered from posterior neck pain after a traffic accident. (A) A CT lateral reconstruction image revealed the odontoid fracture. The fractured odontoid process was slightly displaced posteriorly. He underwent the conservative treatment with halo-vest immobilization at his request. (B) After 16 weeks, the patient complained of continued posterior neck pain, although it was reduced compared with that of the initial trauma. On the CT lateral reconstruction image, we found that the fracture site had not completely healed.