After reading all the posts on this topic i am very disheartened. I have been dealing with persistent and intermittent sharp thigh pain in my left leg since about 8 weeks after bilateral hip replacement 5 months ago. It has gotten progressively worse till I now can not put any weight on my left leg at all. My right side is having the same pain now but not as bad probably because i have been bearing all my weight on that leg. i have had 3 add'l sets of x rays, none of which showed any bone fractures. I just had an MRI which shows bone inflamation - no fractures and no sign of loose implants. My surgeon recommended using crutches to keep no more than about 40% of body weight on that leg, also prescribed meloxicam 2x's a day for a coupe weeks which seems to help me put very light amount of weight on my leg while using crutches. Of course the crutches present other problems as one can not function normally long term with them. He says it is critical to continue putting some weight on the leg to stimulate bone growth. I will follow his recommendations till i see him a month from now and keep you posted as to whether this course of action helps.