SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY
Artificial knee. Coloured frontal X-ray of a prosthetic knee joint (dark orange) that has been fitted to treat rheumatoid arthritis. The implant attaches to the femur (thigh bone, upper frame) and to the tibia (shin bone, lower frame), while a flexible connection allows the joint to hinge like the old joint. The other leg bone, the fibula, is seen at right of the tibia. Rheumatoid arthritis is the second most common form of arthritis (inflammation of the joints). It is an autoimmune disease, where the body's immune system damages the synovial lining of the joints. Prosthetic joints restore mobility to those severely affected by such joint disorders.
Model release not required. Property release not required.