Table 5.
Computer navigation and computed tomography values with cup at 47° of inclination
| Tilt | Real anteversion (°) | Measurement of inclination (°) | Measurement of anteversion (°) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Anatomic | Radiographic | Anatomic | Radiographic | ||||||
| PT | PT* | MONT | CN | PT | PT* | MONT | CN | ||
| No tilt | 0 | 48 | 48.0 | 47.9 | 46.7 | −1 | −0.7 | 0 | 1.3 |
| 10 | 48 | 47.6 | 47.3 | 46.7 | 10 | 7.4 | 7.8 | 6.3 | |
| 20 | 48 | 46.4 | 46.3 | 45.0 | 19 | 14.0 | 15 | 15.0 | |
| 30 | 48 | 43.9 | 43.9 | 43.0 | 30 | 21.8 | 21.5 | 21.3 | |
| 40 | 48 | 40.8 | 40.9 | 40.0 | 39 | 27.9 | 28.3 | 27.7 | |
| 50 | 48 | 35.5 | 35.4 | 34.7 | 50 | 34.7 | 34.4 | 33.3 | |
| Posterior pelvic tilt 6° | 0 | 48 | 48.0 | 48.2 | 47.0 | 0 | 0.0 | 0 | 1.0 |
| 10 | 48 | 47.7 | 47.6 | 45.3 | 8 | 5.9 | 7.7 | 7.0 | |
| 20 | 48 | 46.4 | 46 | 45.7 | 19 | 14.0 | 14.8 | 14.0 | |
| 30 | 48 | 43.9 | 44 | 43.0 | 30 | 21.8 | 22 | 20.7 | |
| 40 | 48 | 40.4 | 40.1 | 40.3 | 40 | 28.5 | 28 | 27.0 | |
| 50 | 48 | 36.6 | 36 | 35.7 | 48 | 33.5 | 35.1 | 33.0 | |
| Anterior pelvic tilt 6° | 0 | 48 | 48.0 | 48.3 | 47.3 | 0 | 0.0 | 0 | 0.3 |
| 10 | 48 | 47.6 | 47.3 | 46.7 | 10 | 7.4 | 7.5 | 7.0 | |
| 20 | 48 | 46.2 | 46 | 45.0 | 20 | 14.7 | 15.3 | 14.0 | |
| 30 | 48 | 44.2 | 44.1 | 43.0 | 29 | 21.1 | 21.8 | 20.3 | |
| 40 | 48 | 40.4 | 40.6 | 40.0 | 40 | 28.5 | 28 | 27.3 | |
| 50 | 48 | 35.5 | 35.4 | 35.0 | 50 | 34.7 | 34.7 | 33.7 | |
* These values were calculated from the anatomic values from HipNav™; PT = HipNav™; MONT = Navitrack®; CN = computer navigation.