Table 7 Postoperative range of motion of the knee and radiographic evaluations in Group A, B, C, and D at 90° flexion
Group A | Group B | Group C | Group D | P value | |
|---|---|---|---|---|---|
Range of motion at 1 year postoperatively | |||||
Maximum extension (degrees) | − 1.2 ± 2.4 | − 0.8 ± 2.2 | − 0.2 ± 1.9 | − 0.4 ± 1.6 | 0.17 |
Maximum flexion (degrees) | 122.1 ± 11.4 | 122.2 ± 15.1 | 123.1 ± 17.3 | 124.7 ± 10.4 | 0.68 |
Postoperative HKA angle (degrees) | 179.0 ± 1.9 | 179.8 ± 2.4 | 179.1 ± 2.0 | 179.3 ± 2.0 | 0.53 |
Femoral varus angle (degrees) | 0.7 ± 1.6 | 0.0 ± 1.8 | 0.4 ± 1.7 | 0.7 ± 1.8 | 0.28 |
Femoral flexion angle (degrees) | 4.7 ± 2.2 | 4.2 ± 2.3 | 5.2 ± 3.3 | 4.5 ± 3.1 | 0.65 |
Femoral external rotational angle (degrees) | 0.2 ± 1.4 | − 0.8 ± 1.7 | 0.8 ± 1.3 | 0.2 ± 1.9 | 0.01b |
Tibial varus angle (degrees) | 0.2 ± 1.3 | 0.2 ± 1.4 | 0.3 ± 0.9 | 0.0 ± 1.2 | 0.66 |
Tibial posterior slope angle (degrees) | 3.3 ± 1.5 | 3.4 ± 1.9 | 2.3 ± 1.4 | 3.1 ± 1.6 | 0.12 |
Tibial external rotational angle (degrees) | 3.0 ± 4.4 | 3.0 ± 3.7 | 4.1 ± 4.7 | 3.2 ± 4.2 | 0.79 |