Osteonecrosis of the hip, a condition where the bone cells in the head of the femur or thigh bone have begun to die, can cause a lot of pain and difficulty in moving around. Many patients who have this disease do end up having a hip replacement but some many do try managing it with medications first.
There have been studies with a medication called alendronate, a medication used to treat osteoporosis, thinning bones. The results have been promising although more studies do need to be done to really say if it is more effective than any other treatment.