SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Hip replacement. Coloured X-ray of a man's pelvis (front view), showing a prosthetic hip implant (red, lower left). The implant is attached by a peg into the femur bone (green), with surgical cement. The socket (centre left) of the ball-and- socket joint, which is part of the pelvis bone, has also been replaced. The new joint is made of a composite metal alloy, which has replaced an arthritic or injured hip.
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