Fig. 4From: Mid-term outcomes of arthroscopic-assisted Core decompression of Precollapse osteonecrosis of femoral head—minimum of 5 year follow-upIntraoperative arthroscopic image demonstrating flattening of femoral head. Arthroscopy functions diagnostically, by allowing for the precise assessment of the articular surfaces of both the femoral head and the acetabulum for accurate staging and evaluationBack to article page