Abstract
Total knee arthroplasty (TKA) has significant medical and economic implications. The
correct placement of the femoral and tibial components is vital to ensure a functional
knee and also low failure and revision surgery rates. This article provides the most
relevant information regarding knee endoprosthesis from a radiologic point of view.
Basic information on the recommended alignment of the femoral and tibial components
in TKA and how to measure them are discussed. We then present the most important axial
plane rotational references for the femoral and the tibial components. The optimal
coronal alignment, illustrating the axes of the lower limb, and loosening as the major
complication are also discussed. Finally, we offer a detailed example of rotational
assessment.
Keywords
total knee endoprosthesis - femoral component - tibial component - loosening - malrotation