Abstract
The cause of non-traumatic Avascular Necrosis of the femoral head (AVN) is unknown in a large proportion of cases. Unless diagnosed early and treated appropriately, it can progress to collapse of the femoral head leading to early degenerative arthrosis. With the advent of modern imaging techniques, AVN can be detected early. Accurate diagnosis of AVN leads to appropriate selection of effective joint-preserving treatment. Techniques aimed at preserving the femoral head, including core decompression, and vascularized/nonvascularized bone graft which are often advised for early necrosis, have shown varying clinical outcomes.
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