Fig. 5

Postoperative X-ray and computed tomography demonstrated the complete preservation of the articular surface of the facet joint. a X-ray; b sagittal view; c coronal view; d axial view; and e three-dimensional computed tomography – oblique view. The arrows are pointing to the the complete preservation of the articular surface of the facet joint and the trajectory to the L2-3 extraforaminal space