Background: Axis vertebra (C2) is involved in various pathologies that lead to instability at the craniovertebral junction. Pre-operative morphometric analysis of the axis vertebra is important since various surgical innervations rely on different anatomical details which vary widely in the population and races. 97 Objectives: To study the various morphometric parameters of the human axis vertebrae(C2) in dry bone specimens. Methods: A total of 30 dry bone specimens of axis vertebrae were collected and their morphometric analysis was done using VernierCalliper. The results were analyzed using appropriate statistical tools and represented using appropriate tables and diagrams. Results: The mean of the maximum anteroposterior diameter and maximum transverse diameter of the superior articular facet was measured as 16.73mm and 15.98mm on the right side,17.05mm and 16.25mm on the left side. The mean distance from the tip of the Transverse Process to the Midline was 29.76mm on the right and 26.46mm on the left side. Conclusion: The vertebral dimensions that were measured in our study can be used to develop instrumentation as well as the reference values for the evaluation and diagnosis of various clinical conditions.

Anthropometry, C2 Vertebra, morphometry Axis.