Journal of AdvancedMedical and Dental Sciences Research

Introduction: There are ethnic variations in the morphometry of odontoid4-6 and it has to be properly known prior to accomplish the success of the surgery either with 1 or 2 screws fixation.Materials and Methods:A specially prepared form for the study was employed to gather the accessible information. Several sites and measurements were established in the axial, sagittal, and coronal plane in CT scan. Measurements were taken for screw length, screw insertion angle, and distance of screw exit from apex in the sagittal plane.Results:The average age of the participants in the study was 43.30 ± 17.11 years (ranging from 17 to 76). There were 114 males and 116 females. AP diameter of the odontoid is bigger than the transverse diameter at the base and waist of the odontoid. Conclusion:In addition, if the size of the odontoid is not sufficient for using a single screw for fixation, then another approach for fixation should be considered.