Fig. 5From: Gallie technique versus atlantoaxial screw-rod constructs in the treatment of atlantoaxial sagittal instability: a retrospective study of 49 patientsA 17-year-old woman had Os odontoideum. a Preoperative CT showed uncombined odontoid process. b, c Postoperative X-ray obtained at the 6th month after the Gallie fixation showed that there was no bridging bone around the iliac bone graft. d Lateral radiographs obtained in the 24th month after the Gallie fixation showing bone fusionBack to article page