Anteroposterior, lateral radiographs of the spine, computed tomography (CT) 3D scans, and magnetic resonance imaging were done in all patients preoperatively. Intraoperatively, only lateral fluoroscopic guided screw fixation was performed with a C-arm [Figure 1 ]. To determine the accuracy of pedicle screw placement, all patients underwent postoperative CT 3D scans to confirm the accuracy of surgical screw placement. In addition, any breaches of the anterior, medial, or lateral pedicle walls were graded according to the Gertzbein and Robbins classification.[4 (link)]
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Accuracy of Pedicle Screw Placement
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Other organizations : Jinnah Postgraduate Medical Center
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Variable analysis
independent variables
- Lateral fluoroscopic guided screw fixation procedure
- Accuracy of pedicle screw placement
- Presence and extent of breaches of the anterior, medial, or lateral pedicle walls (graded according to the Gertzbein and Robbins classification)
- Anteroposterior radiographs of the spine
- Lateral radiographs of the spine
- Computed tomography (CT) 3D scans
- Magnetic resonance imaging (MRI)
- Postoperative CT 3D scans to confirm the accuracy of surgical screw placement
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