 Mesenchymal Stem Cells MSCs have been shown to have immunosuppressive and repairing properties. Bone marrow mononuclear cells BMMNCs have revascularization properties and complimentary effects to MSCs. The investigators will infuse expanded autologous MSCs and BMMNCs into patients with osteonecrosis of the femoral head. The study purpose is to examine whether this treatment will result in improvement in osteonecrosis of the femoral head. 