Hip joint center localisation: A biomechanical application to hip arthroplasty population

Figure 1 The distance between the hip joint center and the mid pelvis.

Figure 2 The Star arc movement. The Star arc movement is starting with a hip flexion, following by three hip abduction, a hip extension and finishing by a hip circumduction.

Figure 3 A local system of coordinates was defined for the pelvis to correspond to the radiographic plane.

Figure 4 The mean of the hip joint center and mid pelvis distance for the three groups, for the operated and non-operated leg.

Figure 5 The mean of the hip joint center localisation error for the functional and predictive methods, for the operated and non-operated leg.