How many bone replacement surgeries can be done for osteonecrosis of the femoral head? If it is a simple bone replacement surgery, it can be done 2-3 times at most. If bone replacement surgery means doing all kinds of minimally invasive and replacement, including bone graft surgery, because of femoral head necrosis, it can be done 3-4 times at most. The specific surgical procedures are minimally invasive surgeries that can be performed in the early stage of osteonecrosis, including medullary core decompression, stem cell transplantation, titanium mesh support surgery, and also myoblastic flap transfer surgery with vascular tissues. The above minimally invasive surgery has certain therapeutic effect in the early stage of femoral head necrosis, when the bone is obviously collapsed or the joint space is changed, and can slow down the development of femoral head necrosis, which is a bone replacement surgery. If there is obvious collapse of the femoral head necrosis, joint gap changes, minimally invasive surgery or conservative treatment drug treatment is not good enough to replace the surgery, this is the second surgery. With the advancement of technology and advanced materials, replacement surgery can last 20-25 years if ceramic materials are used. Unless the patient with femoral head necrosis is relatively young, a 3rd revision surgery can be performed after the early surgery, and a cure can be achieved with several treatments.