Fig. 2

Screw tip, tail, and angle offset assessment. Postoperative CT of L5 screw placement without a medial or lateral breach in A axial and B sagittal planes. Right L5 screw planning in C axial and D sagittal planes. Image overlay analysis with preoperative planned trajectory and postoperative screw placement in E axial and F sagittal planes. The crosshairs indicate screw tip. Note This image is the property of the authors, who are the owners of its copyright