We are doing this to prolong a full hip replacement. My doctor said the AVN was not there when we did surgery in June to reattach the hamstring muscle to the bone,and he had to reshape the hip joint so it would function better as it was not round like it should be and was probably that was when I was born. I haven’t had the surgery yet but the MRI clearly showed where the bone was cutting off blood flow. I opted to do the surgery because my dDr said even at 53 I was to young to do a total hip replacement so we are trying to hold off as long as possible. He did tell me that hip replacement surgery is the easiest surgery to recover from as well as AVN.