Comparison of Standard Anteroposterior Knee and Hip-to-Ankle Radiographs in Determining the Lower Limb and Implant Alignment after Total Knee Arthroplasty

Abstract

The standard AP knee radiograph appears to be a valid alternative to the hip-to-ankle radiograph for determining knee coronal plane alignment in routine followup after total knee arthroplasty. However, the hip-to-ankle radiograph alone provides accurate information on weight-bearing mechanical axis in patients with suspected lower limb malalignment.