The difference between hip arthritis and femoral head necrosis

The difference between hip arthritis and femoral head necrosis is mainly in the following two aspects: first, the causes of the disease are different, hip arthritis is often the existence of primary and secondary factors, secondary factors are mainly acetabular dysplasia, acetabular fractures, etc., the cause of femoral head necrosis is often due to necrosis caused by femoral head ischemia, due to a large number of long-term drinking or taking hormone drugs, as well as femoral neck fracture, hip dislocation, etc. Second, x-ray findings are different, hip arthritis mainly manifested as destruction of articular cartilage, narrowing of joint space, accompanied by the formation of osteophytes, while femoral head necrosis mainly manifested as ischemic lesions of the femoral head, such as cystic changes or femoral head collapse, while the acetabulum has no obvious lesions, joint space is not narrow.