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Table 2 Definition of the surgically modifiable factors (SMF)

From: Surgically modifiable factors measured by computer-navigation together with patient-specific factors predict knee society score after total knee arthroplasty

Name Abbreviation Definition Values
Femoral Joint Line Change max. FJLCmax Femoral joint line change from the most prominent condyle Millimeter
Femoral Joint Line Change min. FJLCmin Femoral joint line change from the less prominent condyle Millimeter
Femoral Component Slope FS Femoral component angle in the sagittal plane Degrees
Tibial Joint Line Change TJLC Tibial joint line change from the unworn compartment Millimeter
Tibial Component Slope TCS Tibial component angle in the sagittal plane Degrees
Extension Gap Size Medial EGSmed Medial gap between the femoral and tibial components in extension Millimeter
Extension Gap Size Lateral EGSlat Lateral gap between the femoral and tibial components in extension Millimeter
Extension Gap Difference Medial-Lateral EGDM-L Difference between EGSmed and EGSlat (EG symmetry) Millimeter
Flexion Gap Size Medial FGSmed Medial gap between the femoral and tibial components in 90° flexion Millimeter
Flexion Gap Size Lateral FGSlat Lateral gap between the femoral and tibial components in 90° flexion Millimeter
Flexion Gap Difference Medial-Lateral FGDM-L Difference between FGSmed and FGSlat (FG symmetry) Millimeter
Flexion Extension Gap Difference FEGD Difference between the mean EGS and the mean FGS (Gap equality) Millimeter
Femoral Offset Changes Medial FOCmed Difference between the medial FO before and after femoral component implantation Millimeter
Femoral Offset Changes Lateral FOClat Difference between the lateral FO before and after femoral component implantation Millimeter
Femoral Rotation FR Femoral rotation relative to the posterior condyle line Degrees