Table 2 Rotational alignment of components (median, range) measured from postoperative CT images for alignment groups defined with respect to anatomic landmarks (surgical transepicondylar axis, medial third of the tibial tuberosity) and rotational mismatch between femoral and tibial components
Alignment group | n (% total) | Rotational alignment (°) | |||
|---|---|---|---|---|---|
Femoral component | Tibial component | Femoral-tibial mismatch | |||
Anatomic Landmarks | Nominal | 46/67 (69%) | 0.6 (−2.8 – 2.7) | 0.0 (−6.5 – 9.9) | 0.4 (−9.5 – 10.6) |
Outliers | 21/67 (31%) | 1.2 (−3.4 – 3.8) | 12.0 (−14.9 – 26.0) | −0.5 (−13.3 – 14.4) | |
p = 0.554 | p = 0.002 | p = 0.846 | |||
Rotational Mismatch | Nominal | 44/67 (66%) | 0.6 (−3.4 – 3.8) | 0.0 (−13.3 – 26.0) | −0.2 (−5.0 – 4.6) |
Outliers | 23/67 (34%) | 0.9 (−3.1 – 3.5) | 0.0 (−14.9 – 20.9) | 6.2 (−13.0 – 14.4) | |
p = 0.659 | p = 0.084 | p = 0.146 | |||