MIRIAM MASLO / SCIENCE PHOTO LIBRARY MIRIAM MASLO / SCIENCE PHOTO LIBRARY
Hip replacement, coloured X-ray. The metal prosthetic hip joint is seen running into the thigh bone (femur) at centre. At upper centre, the metal cup into which the head of the shaft fits is seen in place in the pelvis. Hip replacements are performed when the hip joint has been eroded by arthritis, or when the femur is badly broken. The latter is common in old women after the menopause, as that marks the cessation of production of the hormone oestrogen, which is necessary for maintaining bone mass. Without it, bones become weaker, and a fall can easily break the head of the femur, as was the case here. Hip replacements can restore mobility in the majority of cases.
Model release not required. Property release not required.