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Table 1 Rotational measurements

From: Averaging rotational landmarks during total knee arthroplasty reduces component malrotation caused by femoral asymmetry

 

Mean

SD

Range

SL to SEA

−0.7°

2.3°

−5.5° to +4.6°*

PCL to SEA

−2.1°

1.9°

−9.1° to +2.0°*

PCA to SEA

+0.9°

1.9°

−6.1° to +5.0°

PCL to SL

−1.4°

3.2°

−10.6° to +6.3°

PCA to SL

+1 6

3.2°

−7.6° to +9.3°

Actual component position

+0.6°

1.4°

−3.8° to +4.0°**

Calculated mean PCA and SL to SEA

+0.1°

1.4°

−3.7° to +2.7°*

  1. Positive measurements are externally rotated
  2. *Decreased variance of calculated mean PCA and SL to SEA when compared to either SL (F = 15.805, p < 0.001) or PCA (F = 7.068, p < 0.001) individually
  3. **Decreased variance of actual component position when compared to either SL (F = 22.634, p < 0.001) or PCA (F = 4.902, p < 0.05) individually