ALEXANDER TSIARAS / SCIENCE PHOTO LIBRARY. ALEXANDER TSIARAS / SCIENCE PHOTO LIBRARY.
Portrait of an orthopaedic surgeon holding a titanium hip prosthesis, prior to implanting it into a young man whose both hip joints had been severely damaged by rheumatoid arthritis in infancy. The metal shaft will be embedded into the long bone of the femur (the thigh bone), following the removal of the natural ball of the femoral head. The ball section articulates with a plastic socket that is anchored into the hip bone.
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