Gait Analysis after Total Knee Arthroplasty Assisted by 3D-Printed Personalized Guide

Figure 2

The method to distinguish the insufficient or excessive extorsion of femoral component was measured by CT. Red lines showed the patella transverse line (PTL) and the surgical transepicondylar axis (sTEA), respectively, the green and blue lines represented posterior condyle lines (PCL) under different external rotation states. If it was PCL1 (green line) in the internal rotation position of sTEA (green curved arrow), the patient was assigned to group C; if it was PCL2 (blue line) in the external rotation position of sTEA (blue curved arrow), the patient was assigned to group B.