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  Indian J Med Microbiol
 

Figure 2: “X-angle”: Measured in the coronal section of the computed tomography-scan, 2 lines are drawn between the joints of C0–C1 and C1–C2 forming an X on the odontoid. Type A: Healthy articulation; Type B: Osteoarthritic changes; and Type C: Ankylosis. The mean value for healthy articulations (Type A) was 125° and that of ankylosed (Type C) 135° due to facet joints collapse

Figure 2: “X-angle”: Measured in the coronal section of the computed tomography-scan, 2 lines are drawn between the joints of C0–C1 and C1–C2 forming an X on the odontoid. Type A: Healthy articulation; Type B: Osteoarthritic changes; and Type C: Ankylosis. The mean value for healthy articulations (Type A) was 125° and that of ankylosed (Type C) 135° due to facet joints collapse