Table 2.
Result of postoperative radiological assessment
| Measurements | Category | RATKA (n = 143) |
MTKA (n = 151) |
p value |
|---|---|---|---|---|
| Postoperative Mechanical axis | Excellent | 116 (81.1%) | 76 (50.3%) | < 0.001 |
| Acceptable | 27 (18.8%) | 39 (25.8%) | ||
| Outlier | 0 (0%) | 36 (23.8%) | ||
| Coronal inclination of femoral component | Excellent | 124 (86.7%) | 78 (51.6%) | < 0.001 |
| Acceptable | 19 (13.3%) | 39 (25.8%) | ||
| Outlier | 0 (0%) | 34 (22.5%) | ||
| Coronal inclination of tibial component | Excellent | 119 (83.2%) | 83 (54.9%) | < 0.001 |
| Acceptable | 24 (16.7%) | 43 (28.4%) | ||
| Outlier | 0 (0%) | 25 (16.5%) | ||
| Sagittal inclination of femoral component | Excellent | 109 (76.2%) | 107 (70.8%) | 0.566 |
| Acceptable | 24 (16.8%) | 30 (19.8%) | ||
| Outlier | 10 (6.9%) | 14 (9.3%) | ||
| Sagittal inclination of tibial component | Excellent | 109 (76.2%) | 79 (52.3%) | < 0.001 |
| Acceptable | 28 (19.6%) | 36 (23.8%) | ||
| Outlier | 6 (4.2%) | 36 (23.8%) |
Excellent—defined when the values were within 0–2° from the planned alignment
Acceptable—defined when the values were > 2° but < 3° from the planned alignment
Outlier—defined when the values were ≥ 3° from the planned alignment