DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Knee replacement scar. Staples are seen holding the edges of the surgical incision together to allow it to heal. A TKR operation involves opening up the knee joint and using surgical implants to replace the bones and cartilage of the joint. The different forms of arthritis are a common reason for a TKR operation, as well as severe injury to the knee.
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