Table 4 Intraoperative coronal, sagittal components position and knee range of motion between both groups (fixed flexion contracture (FFC) < 5° vs ≥ 5°)
Intraoperative measurements | Patients with FFC < 5° Means ± SD (range) | Patients with FFC ≥ 5° Means ± SD (range) | P-value |
|---|---|---|---|
Coronal deformity (varus < 180, valgus > 180) | 180° ± 2 (177 to 184) | 179° ± 3 (174 to 185) | 0.16 |
Femoral component flexion | 3.9° ± 2.1 (0 to 7.7°) | 3.4° ± 2 (0 to 9.4°) | 0.31 |
Tibial component slope | 6.7° ± 2.2 (3.5 to 10.9°) | 7.2° ± 2.1 (5 to 14.1°) | 0.54 |
Sum of femoral and tibial sagittal positioning | 10.7° ± 2.3 (7 to 15.2°) | 10.6° ± 3.1 (6.9 to 23.5°) | 0.79 |
Mechanical Lateral Distal Femoral angle (varus > 90, valgus < 90) | 85.9° ± 2.6 (80.4 to 91) | 87° ± 2.7 (81.5 to 92.5) | 0.25 |
Medial Proximal Tibial angle (varus < 90, valgus > 90) | 87.4° ± 2 (84.4 to 90.5) | 87° ± 2 (82.4 to 89.3) | 0.57 |
Number of tibial recuts | 9 | 15 | 0.38 |
Maximum knee extension Contracture | 0.4° ± 1 (0 to 4°) | 1.5° ± 1.6 (0 to 5°) |  < 0.001 |
Maximum Knee Flexion | 131° ± 8 (120 to 149°) | 130° ± 7 (117 to 141°) | 0.68 |