Finite element model of the hip. Finite element model of the proximal femur and acetabulum. Spring elements join the two components and represent the capsular ligaments. The model is fixed at the top and loaded through the base of the femur. Also shown with an asterisk is the link-element used to apply the abductor force in the model representing one-legged stance. Red: modulus 17 GPa Blue: modulus 400 MPa Turquoise: modulus 100 MPa.