JOHN COLE / SCIENCE PHOTO LIBRARY JOHN COLE / SCIENCE PHOTO LIBRARY
Knee replacement surgery. Hands of a surgeon carrying out an operation to replace a knee joint. The surgeon is about to cut open the skin, fat and muscle over the knee, and reveal the knee joint. Artificial knee joints are used to restore mobility in those whose knees have been injured or affected by severe arthritis. This operation is being carried out at an NHS (National Health Service) hospital, St Richard's Hospital in Chichester, West Sussex, England.
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