The treatment for odontoid fracture have been mainly conservative. The methods of conservative treatment are skull traction, Minerva Jacket, and recently Halo-Vest. But the results of conservative treatment for odontoid fracture were poor. There have been so many pseudoarthrosis by these methods. The average rate of pseudoarthrosis was 26.2%. Nakanishi reported five cases of odontoid fracture which were treated from anteriorly by using a cancellous bone screw. He got good results by this method. We operated on two cases of odontoid fracture with the same method. The result was excellent.
