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Table 4 Comparison of incidence and depth of notching between the limbs of FBRD group, based on the DCA values of the contralateral (FBRE) limbs

From: Notching is less, if femoral component sagittal positioning is planned perpendicular to distal femur anterior cortex axis, in navigated TKA

Parameters of FBRD limbs

Contralateral (FBRE) limbs with DCA ≤ 3°

Contralateral (FBRE) limbs with DCA > 3°

p-Value

Number of limbs

137

34

 

Incidence of notching

13/137 (9.5%)

21/34 (61.8%)

 < 0.00001

Mean notch depth (mm)

1.1 ± 0.56

(R = 0.2–2)

1.79 ± 0.67

(R = 0.7–3.3)

0.00293

  1. FBRD femur anterior bowing registration disabled; FBRE femur anterior bowing registration enabled; DCA distal anterior cortex angle; mm millimetre; R range
  2. p < 0.05 is considered statistically significant (bold)