Fig. 2.

A cervical spine model showing the trajectory of the Kim's method. A : Posterior view of the cervical spine model that shows the entrance point and trajectory; the entrance point is 1 mm medial from the center of the posterior surface. The lateral angle is determined by leaning the body of the screw driver on the tip of the spinous process. B : Lateral view of the cervical spine model showing the sagittal plane of the Kim's method that passes through the center of the posterior arch of the spine.