Fig. 2.

Biomechanical parameters determined in pre- and postoperative radiographs after SHA and THA: 1 horizontal hip centre of rotation, 2 vertical hip centre of rotation, 3 vertical femoral offset, 4 horizontal femoral offset, 5 abductor lever arm, 6 limb length, 7 stem-shaft angle, A vertical teardrop line, B horizontal tear drop line, C midline lesser trochanter, D femoral shaft axis, Etangential line to the greater trochanter, F stem axis