Result: The authors found an average pedicle width of 5.0 ± 1.4 mm, pedicle height of 4.9 ± 1.3 mm, axial angle of 43.1 ± 3.7°, sagittal angle of 18.5 ± 2.4° and the average screw length was 25.7 ± 3.2 mm.