The Hidden Collapse: How Avascular Necrosis Destroys the Hip Joint 🦴. What happens when a living bone begins to die? Avascular Necrosis (AVN) is a serious condition where the blood supply to the "ball" of the hip joint (femoral head) is cut off, leading to a silent but devastating collapse. 🎥🩸 Go beneath the surface to witness the reality of this condition: The Blood Supply Crisis: Unlike other forms of arthritis, AVN starts deep inside the bone. When blood flow is interrupted—whether by inju