Figure 4From: Hip abductor moment arm - a mathematical analysis for proximal femoral replacementProximal femoral prostheses. Graphic depiction of the normal relationship of the abductor muscle insertion in relation to the femoral head (blue lines) and the position of hip abductor muscle insertion with the femoral head after medial displacement (red lines). The dotted lines represent the trajectory along which the abductor muscle moment arm would be maximal.Back to article page