Table 2.
Comparison between the two groups regarding screw malplacement
| Screw malplacement | Free hand group (n = 108) | 3D group (n = 100) | P | ||
|---|---|---|---|---|---|
| No. | Percent | No. | Percent | ||
| Lateral axial | |||||
| Encroachment | 12 | 11.1 | 3 | 3.0 | 0.446 |
| FP < 3 mm | 3 | 2.7 | 0 | 0.0 | |
| FP 3–6 mm | 4 | 3.7 | 0 | 0.0 | |
| Medial axial | |||||
| Encroachment | 31 | 28.7 | 22 | 22.0 | 0.883 |
| FP < 3 mm | 4 | 3.7 | 4 | 4.0 | |
| FP 3–6 mm | 1 | 0.9 | 1 | 1.0 | |
| Anterior axial | |||||
| Encroachment | 8 | 7.4 | 3 | 3.0 | 0.836 |
| FP <3 mm | 2 | 1.9 | 1 | 1.0 | |
| Caudal sagittal | |||||
| Encroachment | 16 | 14.8 | 5 | 5.0 | 0.025* |
| FP < 3 mm | 0 | 0.0 | 2 | 2.0 | |
| Cranial sagittal | |||||
| Encroachment | 7 | 6.5 | 5 | 5.0 | 0.126 |
| FP < 3 mm | 0 | 0.0 | 2 | 2.0 | |
* Statistical significance