Interruption of the blood flow may occur in intraosseous arteries within the femoral head.We report a 72-year-old woman who developed osteonecrosis of the femoral head 11 RPM Sensor months after surgery involving massive cementing of a Hockey Protective - Shin Pads - Intermediate segmental distal femoral rotating hinge prosthesis to treat nonunion of the distal femur.The bone cement filled the cavity up to the femoral neck and the superolateral portion of the femoral head, blocking the bone marrow.