Table 8.
Published series employing CT scan protocol to measure tibial and femoral component rotational position
| Publication | Year of study | TKA | TKA group | Tibial | Femoral | Combined | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean (degrees) | Range (degrees) | p Value | Mean (degrees) | Range (degrees) | p Value | Mean (degrees) | Range (degrees) | p Value | ||||
| Berger et al. [3] | 1998 | 30 | 1. Lateral tracking and tilt | 1.8 IR | NS | 0.8 IR | NS | Not reported | 1–4 IR | 0.0001 | ||
| 2. Subluxation | 4 IR | NS | 1.9 IR | NS | 3–8 IR | |||||||
| 3. Early dislocation | 8.7 IR | NS | 2.4 IR | NS | ||||||||
| 4. Prosthesis breakage | 8.3 IR | 3.9 IR | 7–17 IR | |||||||||
| 20 | 5. Control | NA | NA | NA | NA | 10–1 ER | ||||||
| Barrack et al. [2] | 2001 | 14 | Anterior knee pain | 6.2 IR | 15 IR–6 ER | 0.012 | 1.5 ER | 5 IR–7 ER | NS | 4.7 IRl | 4 ER–17 IR | 0.0035 |
| 14 | Control | 0.4 ER | 8 IR–12 ER | 2.2 ER | 4 IR–9 ER | 2.6 ER | 14 ER–4 IR | |||||
| Current study | 2010 | 34 | Prerevision | 13.2 IR | 1–35 IR | 1.8 IR | 0–9 IR | 14.9 IR | 2.7 ER–37.7 IR | 0.0001 | ||
| 18 | Postrevision | 3.4 ER | 0.8 ER | 3.4 ER | ||||||||
IR = internal rotation; NA = not available; ER = external rotation; NS = nonsignificant.