Firstly, in cases where there is a clear primary disease, the primary disease should be actively controlled.
Secondly, there are different stages of femoral head necrosis.
Before it collapses, there are many possibilities and the necrotic area may progress minutely or even remain intact. At this point, it is more likely that some medication or joint-preserving surgery will be undertaken, but the latter requires strict indications.
For a femoral head that has collapsed, there is no particularly effective solution other than joint replacement, but it is not always necessary to have a hip replacement, which should be considered in the context of the patient’s own symptoms, and the impact on quality of life.