Femoroacetabular impingement (or FAI) occurs when the ball (head of the femur) does not have its full range of motion, and results in pinching or friction in the hip joint, which may cause damage to the labrum (a fibrous cartilage that lines the outer edge of the socket) and/or the articular cartilage. Decompression of the femoral-head neck junction restores the normal head neck junction and provides the femoral head within the acetabulum with full flexion and rotation.
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