D & L GRAPHICS / SCIENCE PHOTO LIBRARY D & L GRAPHICS / SCIENCE PHOTO LIBRARY
Prosthetic hip joint and Gruen zones. Cutaway diagram of a femur (thigh bone) showing a femoral component of a hip prosthesis and labels indicating Gruen zones. The femoral component is implanted in the femur after the head of the femur has been surgically removed. The other components of the hip joint are a rounded ball to fit into the socket implanted in the patient's pelvis (not shown). Gruen zones are used to assess bone mineral density (BMD) after total hip replacement surgery. This is a Symax prosthesis fitted without bone cement. For a set of Gruen zone diagrams, see C016/6776 to C016/6781.
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