DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Dislocated hip replacement, X-ray. The part of the implant (white) attached to the thigh bone (femur) has separated from the bowl-shaped part embedded in the pelvis (centre). Dislocations are usually caused by a blow or a fall. Hip replacements are performed on patients with severe arthritis, where damage to the bones leads to pain and immobility. The artificial joint allows normal movement again. Dislocations are treated by placing the joint in its correct position and immobilising it to allow the surrounding tissues to heal.
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