DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Knee replacement surgery scars on a 66-year-old man. The patient suffered a softening of his bones (rickets), due to a deficiency of vitamin D. This can cause bone deformity. In this case the patient required bilateral knee replacement surgery to replace his knee joints with artificial prosthetic knees. Photographed 2 months after the operation.
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