DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Knee replacement surgery. Surgical team performing a total knee replacement operation. During the operation prostheses will be implanted into the thigh bone (femur) and shinbone (tibia) to form an artificial knee joint. Here, a metal guide is being used to shape the surface of the femur to fit the prosthesis. Knee joints need replacing when the protective cartilage that surrounds them is lost.
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