Table 3.
Radiographic results
| Parameters | Cementless (n = 80) | Cemented (n = 80) | P value* |
|---|---|---|---|
| Mean knee alignment (°) (range) | |||
| Pre-operative | 10.5 (5–20) | 11.2 (7–20) | 0.615 |
| Postoperative | 5.6 valgus (3–6) | 5.4 valgus (3–7) | 0.152 |
| Mean femoral component position (femoral angle) (°) (range) | |||
| Coronal | 95 (93–103) | 97 (94–101) | 0.265 |
| Sagittal | 3.1 (−0.7 to 9) | 3.6 (1–8) | 0.903 |
| Tibial component position (°) (range) | |||
| Coronal | 91 (85–93) | 89 (86–92) | 0.331 |
| Sagittal | 85 (78–90) | 84 (79–95) | 0.617 |
| Joint line (mm) (range) | |||
| Pre-operative | 15.5 (10–25) | 15.7 (8–24) | 0.776 |
| Postoperative | 14.9 (8–20) | 14.5 (8–20) | 0.739 |
| Posterior condylar offset (mm) (range) | |||
| Pre-operative | 26.1 (21–31) | 25.9 (19–32) | 0.771 |
| Postoperative | 25.9 (18–30) | 25.7 (21–31) | 0.152 |
| Radiolucent line (tibial side) (%) | |||
| Zone 1 ( < 1 mm) | 8 (10) | 10 (13) | – |
| Radiolucent line (<1 mm) (femoral side) (%) | |||
| Anterior flange | 12 (15) | 15 (19) | – |
| Posterior flange | 15 (19) | 13 (16) | |
| Patellar component angle (°) (SD) | |||
| Pre-operative | 11.2 (4.8) | 11.9 (4.5) | 0.665 |
| Postoperative | 3.6 (5.1) | 3.5 (3.3) | 0.897 |
SD standard deviation
*Paired t test