Table 2 Interpretation of pedicle screw placement
Screw placement | No. of screws (%) |
|---|---|
Adequate insertion | 817 (95.7) |
Misplacement | 37 (4.3) |
 Minor (cortical perforation <3 mm) | 28 (3.3) |
 Moderate (cortical perforation 3–6 mm) | 7 (0.8) |
 Severe (cortical perforation >6 mm) | 2 (0.2) |