The iliofemoral ligament is the strongest ligament in the body, shaped like an inverted Y from the anterior inferior iliac spine to both trochanters, primarily resisting hip extension and external rotation.
Prevents hip hyperextension in standing, allowing upright posture with hip extensors relaxed.
Must rupture for posterior hip dislocation to occur. In hip replacement, preserving it improves posterior stability.
High-energy traumatic dislocation requiring iliofemoral ligament failure, demanding urgent reduction to prevent avascular necrosis of the femoral head.
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