I have some avascular necrosis in both big toe joints. My doc says it's from all the pred use years ago. Both those joints are 'dead'. No real cure. I just live with the pain.

Thanks Bodini- I have AVN in my right hip and the symptoms have increased in the past  two months; pain, hard walking in it, my hip 'gives' out. From what I have read, no real cure. 

Well, the hip, at least, can be replaced. Some people might use the word "cure" for that, and others wouldn't. Other bones may be difficult or impossible to replace. Unfortunately nothing will heal a bone that has lost its blood supply.