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Weight-bearing bilateral long-leg standing radiograph of a 69-year-old female pre-TKA, right knee, and post-TKA, left knee. I Angle between the mechanical axis of both tibia and femur (HKA). II Maquet’s line, intersecting the joint line in significant varus. III Angle between mechanical axis of femur and a tangent of the prosthesis condyles (mLDFA). IV Angle between mechanical axis of the tibia and the tibial plateau (MPTA)
