Table II.
Pre- and postoperative lower limb and knee alignment, according to the type of implant.
| TKA (n = 38) | Bi-UKA (n = 32) | ||||||
|---|---|---|---|---|---|---|---|
| Variable | Preop | Postop | Delta | Preop | Postop | Delta | p-value* |
| Mean femoral coronal angle (MDFA), ° (SD) | 92.5 (2.2) | 89.8 (2.1) | 2.6 (2.2) | 92.2 (2.8) | 91.3 (2.1) | 0.9 (1.6) | 0.001 |
| Mean femoral sagittal angle, ° (SD) | -0.5 (2.2) | 2.2 (3.4) | -2.7 (2.9) | 0.0 (2.6) | 3.1 (5.4) | -3.1 (6.6) | 0.650 |
| Mean femoral axial angle, ° (SD) | 2.7 (2.4) | -1.6 (2.5) | 4.3 (2.9) | 2.4 (2.1) | 2.2 (2.4) | 0.2 (2.2) | < 0.001 |
| Mean tibial coronal angle (MPTA), ° (SD) | 85.4 (2.5) | 89.6 (1.7) | -4.3 (2.8) | 86.0 (2.5) | 86.6 (2.9) | -0.6 (2.5) | < 0.001 |
| Mean tibial sagittal angle – medial, ° (SD) | 7.1 (3.3) | 3.2 (2.1) | 3.9 (3.6) | 6.0 (3.6) | 4.4 (2.7) | 1.6 (2.4) | 0.006 |
| Mean tibial sagittal angle – lateral, ° (SD) | 4.6 (4.8) | 3.2 (2.1) | 1.4 (4.6) | 5.4 (4.4) | 5.4 (3.2) | 0.1 (3.6) | 0.159 |
| Mean tibial axial angle, ° (SD) | -12.9 (7.1) | -5.2 (6.1) | -7.7 (9.2) | -10.7 (5.5) | -12.1 (4.6) | 1.4 (7.1) | < 0.001 |
| HKAA, ° (SD) | 177.8 (3.1) | 179.5 (3.2) | -1.6 (2.7) | 178.2 (4.2) | 177.8 (3.4) | 0.3 (2.4) | 0.001 |
*
Mann-Whitney U test.
HKAA, hip-knee-ankle angle; MDFA, medial distal femoral angle; MPTA, medial proximal tibial angle.