Table 3.
Comparison of Navigation System and Radiographic Measurements of Coronal Alignment between Group N and Group D
| Measurement | Group N (n=22) | Group D (n=7) | p-value |
|---|---|---|---|
| Preoperative (°) | |||
| Radiograph | |||
| MA | Varus 8.2±3.0 | Varus 9.6±1.6 | 0.266 |
| PSA | 11.3±3.0 | 11.7±2.8 | 0.780 |
| Navigation | |||
| MA | Varus 9.8±2.7 | Varus 9.9±1.8 | 0.888 |
| Postoperative (°) | |||
| Navigation | |||
| MA in unloaded position | Valgus 3.4±0.7 | Valgus 3.9±0.9 | 0.119 |
| MA under varus force | Valgus 1.3±0.9 | Valgus 1.3±0.6 | 0.855 |
| MA under valgus force | Valgus 5.7±1.1 | Valgus 5.9±1.1 | 0.712 |
| Radiograph | |||
| MA | Valgus 3.1±1.0 | Valgus 0.9±0.8 | <0.001 |
| PSA | 8.6±3.5 | 9.2±1.7 | 0.515 |
MA: the angle between the femoral and tibial mechanical axes, PSA: posterior tibial slope angle.