Metric Characteristics of the Odontoid Process of the Axis in Koreans

Lee, Kyu Seok; Lee, Hye Yun; Chung, In Hyuk

Abstract

The odontoid process of the ninety axis were measured to observe the morphological features in Koreans. The results are as follows. 1. Height of the ordontoid of process of axis was 14.1±1.3mm, and the degree of the height of the odontoid process to the height of axis was frequency of 38.2±2.6%. 2. Transverse diameter of odontoid process of the most axis (87.8%) was thinner at the lower part than at the upper part. And the difference of the thickness of upper part and lower part was 1.2±0.7mm. In anteroposterior diameter, lower part was thinner than upper part in frequency of 55.6%, and the difference of upper part and lower part was 1.0±0.5mm in the transverse diameter, 0.6±0.5mm in the anteroposterior diameter, therefore the thickness of the anteroposterior diameter. 3. The articular surface of the odontoid process of the axis articulating with the anterior arch of atlas was 8.9±1.7mm in the maximal length and 7.1±1.6mm in the maximal breadth.