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A Nature Research Journal. Translaminar screw fixation TSF of the axis is considered as an efficient, safe and simple surgical procedure, however the study of the potential risk of TSF to the transverse foramen in lower cervical spine is lacked.
Head-neck CT images of 60 patients were included in this study. Maximum screw length, laminar thickness, the screw angle and the laminar height were measured. The feasibility of 3. C7 had the highest The safe screw length was The present study showed that translaminar screw could place the transverse foramen of C5βC7 at risk.
Preoperative CT scanning was necessary for safe screw placement. Translaminar screw of C2, firstly described by Wright 1 , is considered to reduce the risk to the vertebral artery VA and nerve root, and make relevant structures visualized during operation 2 , 3.
Several studies showed C2 translaminar screw was similar to C2 pedicle screw and C2 pars screw in biomechanical performance 4 , 5 , 6. Recent clinical studies reported a lower probability of ventral cortical breaches or instrumentation failures with C2 translaminar screw fixation, and a higher fusion rate without neural or vascular complications 1 , 2 , 3 , 7 , 8 , 9 , 10 , 11 , However, a computerized tomography angiogramβbased morphometric analysis conducted by Riesenburger RI et al.
