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Comparison between the two groups regarding accuracy of screw positioning
| Malplacement | Free hand technique (108 screws) |
3D (100 screws) |
|---|---|---|
| Encroachment | 75 | 38 |
| Minor penetration (<3 mm) | 9 | 9 |
| Moderate penetration (3–6 mm) | 5 | 1 |
| Severe penetration | 0 | 0 |
| Intraoperative screw revision | 6 | 0 |
| Accuracy | 89.8 % | 99 % |
