Table 2 Comparison of postoperative screw trajectory parameters with ideal screw trajectory parameters in the freehand group
From: Digital anatomical study and clinical application of the ideal S2 alar-lliac screw trajectory
Group | SA (°) | TA (°) | HD (mm) | VD (mm) |
|---|---|---|---|---|
Ideal screw trajectory | 31.3 ± 2.3 | 42.4 ± 2.3 | 4.7 ± 1.0 | 19.7 ± 1.9 |
Free-hand group | 35.9 ± 3.8 | 44.7 ± 3.3 | 5.0 ± 1.0 | 18.4 ± 2.4 |
t value | -6.070 | -3.241 | -1.561 | 2.466 |
P value | <0.001 | 0.002 | 0.123 | 0.016 |