ANTONIA REEVE / SCIENCE PHOTO LIBRARY ANTONIA REEVE / SCIENCE PHOTO LIBRARY
Hip replacement surgery. Image 8 of 9. Prosthetic hip joint in place during hip replacement surgery. The joint consists of a metal head, which is attached to a stem inserted in the femur (thigh bone), and a plastic socket (white) that sits in the pelvis. The prosthetic joint will articulate in exactly the same way as a normal hip joint. Joints may need to be replaced after injury, disease or deformity. This hip is being replaced because of congenital hip dysplasia, a condition where the hip joint does not fit together properly, causing it to dislocate frequently and to become worn. For a sequence showing the operation see M551/418-M551/426.
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