Traumatic Craniocervical Dissociation in Patients with Congenital Assimilation of the Atlas to the Occiput

Figure 3

Case 1: postoperative CT. (a) The reduction of the cortical step-off between the anterior arch of C1 and the clivus with partial reduction of the odontoid. (b) Right and (c) left. C1 screws were not placed. The vertebral arteries course bilaterally below the C1 ring. Lateral mass screw placed bilaterally at C4, C5, and C6. (d) Fixation to C2-C3 vertebrae block was obtained by placing laminar screws bilaterally at C2.

(a)

(b)

(c)

(d)