Change in the position of the popliteal artery with knee flexion after total knee arthroplasty: AAOS exhibit selection.

Introduction: Total knee arthroplasty (TKA) is common orthopaedic operations with low complication rates. In the preoperative knee, 90° flexion allows the popliteal artery (PA) to move safely backward from the tibia [1]. However, this surgery is in close proximity to the PA, the behavior of which during flexion of the prosthetic knee is poorly understand. Especially, there is little appropriate information about the difference of the implant design in the literature. We examined the position of the PA to asses the position of the vessel in knees after mobile-bearing TKA with posterior cruciate ligament (PCL)-retaining (PCLR) and PCL-sacrificing (PCLS) prostheses.