SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY
Artificial hips. Coloured frontal X-ray of the hip bones and prostheses of a 60-year-old patient who has had a double hip replacement. The patient is in a standing position. There are two parts to a prosthetic hip: the femoral implant and the pelvic socket. The pelvic sockets (cup-shaped) replace the natural sockets in the pelvic bones, and are at upper right and upper left. The pelvis is across top and at centre. The femoral implants (at lower left and lower right) are implanted in holes that are drilled inside the femurs (thigh bones). The ball-shaped head of the femoral implant protrudes outside the femur, fiting into the pelvic socket. It replaces the old femoral head, which is removed in the operation. This operation restores mobility to those affected by conditions like arthritis and osteoporosis.
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