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Fig. 1 | Journal of Orthopaedic Surgery and Research

Fig. 1

From: Effect of sagittal screw angle and distance of screw apex to superior endplate on adjacent segment disease after posterolateral lumbar fusion: a retrospective study

Fig. 1

Parameters of radiological evaluation of spinopelvic parameters, ASD diagnosis and pedicle screw fixation. A Preoperative spinopelvic parameters of patients evaluated by lateral radiograph. B Proximal adjacent segment disk height, opening angle at L3–4, L3 vertebral slippage, distance of pedicle screw apex to superior endplate and sagittal screw angle between pedicle screw and superior endplate of L4 by lateral radiograph (not the same patient in A). C Horizontal screw angle, the mean angle of two pedicle screws at L4 and middle line by horizontal plane

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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X