D & L GRAPHICS / SCIENCE PHOTO LIBRARY D & L GRAPHICS / SCIENCE PHOTO LIBRARY
Prosthetic hip joints and Gruen zones. Diagram of the femoral components of two types of hip prosthesis with labels indicating standard and modified Gruen zones. The components are implanted in the femur (thigh bone) after the head of the femur has been surgically removed. The other components (not shown) are a rounded ball to fit into the socket implanted in the patient's pelvis. Gruen zones are used to assess bone mineral density (BMD) after total hip replacement surgery. These are both cementless prostheses (Symax at left). For a set of Gruen zone diagrams, see C016/6776 to C016/6781.
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