Pelvic Tilt is defined angle between the vertical and the line through the midpoint of the sacral plate to femoral heads axis.
Pelvic tilt, sacral slope and pelvic incidence
Normal average is 40°.
Overhang defined as the horizontal offset between the midpoint of the sacral plate and the femoral heads axis.
Sum of sacral slope and pelvic tilt gives pelvic incidence.
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