Fig. 3

Axial computed tomography slice of a total knee arthroplasty in a male patient, showing neutral femoral component rotation in relation to the surgical transepicondylar axis (sTEA). The sTEA is plotted as a line drawn from the sulcus of the medial epicondyle to the prominence of the lateral epicondyle. The posterior condylar line of the femoral component is plotted as a line drawn from connecting the posterior margins of the medial and lateral posterior component condylar surfaces. The angle between these two lines was then measured and is the posterior condylar angle