Idiopathic avascular necrosis of the head of femur is is a disease where there is cellular death (necrosis) of bone components due to interruption of the blood supply. Many risk factors are known, however, if no cause is found it is termed as idiopathic.
The correct treatment for this usually is total hip replacement. Some doctors prescribe bisphosphonates.The role of stem cells is totally experimental. While a few studies have shown some beneficial effect, others have denied it. As on date, stem cell culture and subsequent injection into the joint area is absolutely experimental, and at best can only be compared to a placebo!