Sex cameras and hip
Diagnostic criteria were according to hip OA diagnostic criteria of American College of Rheumatology.
A control group of sixty-six (132 hips) mild-to-moderate bilateral OA patients 20 to 50 years old were collected.
Concavity was used to assess the sphericity of the head as it joins the neck.
The femoral neck anteversion angle and some parameters of the acetabulum: anteversion, inclination and CE angle were measured too.
In the lateral plane, the femur was put in such a position that the axis of femoral neck was parallel to the coronal plane with the convex surfaces of the medial, lateral condyle and the posterior apex of greater trochanter in the same horizontal plane (Fig. The main parameters we measured were three parameters of the head-neck relationship (translation, rotation, concavity) and the neck-shaft relationship (neck anteversion), as described by Toogood The AOS was defined as the perpendicular distance (ab) between Lines A and B, Line A was drawn parallel to the neck axis and tangential to the convexity of the femoral head; Line B was drawn parallel to the neck axis and tangential to the concavity of the femoral neck.
Similarly, the POS was defined as the perpendicular distance (cd) between Lines C and D, SOS was defined as the perpendicular distance (ef) between Lines E and F, and IOS was defined as the perpendicular distance (gh) between Lines G and H.