LUNAGRAFIX / SCIENCE PHOTO LIBRARY LUNAGRAFIX / SCIENCE PHOTO LIBRARY
Broken arm. Coloured X-ray showing a fracture (upper right) of the bones in the forearm. Both the upper ulna bone and the larger radius beneath it have broken near the wrist joint (far right). There are two main types of fracture. In a simple bone fracture the bones break cleanly, with little damage to surrounding tissues and no break in the overlying skin. In a compound fracture the ends of the broken bones pierce the skin, giving a risk of infection. Treatment of a fracture involves realignment of the bone ends, combined with immobilization by external splints or internal fixation such as pinning until the bones have healed.
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