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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