Hip

Hip joint: this is a ball-socket joint. It is a very stable joint- at the expense of some reduction in mobility. However, we still have more movement than we need. To perform ADL , we need 120⁰ of flexion and 20⁰ of ER and ABduction. The load is transmitted to the femoral head mainly via superior quadrant of the acetabulum. Proximal femur has trabeculae oriented to help transmit load to diaphysis. Normal neck-shaft angle is 125⁰.

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