Research Article

[Retracted] Treatment of Upper Cervical Spinal Cord Injury (Unstable C1-C2) by Direct Visualization and Nailing Technique and the Advantages of Early MRI

Figure 3

The vertebral body where the posterior arch <4 mm. (a) The safe zone of inserting the screw; (b) the nail opening the cortical bone before inserting the screw.
(a)
(b)