This is a 3D animation module on Knee replacement surgery (arthroplasty). It is intended to be shown as an educational and informational tool for patients before surgery and also to medical students and residents. Arthroplasty involves replacing a damaged, worn or diseased knee with an artificial joint. It's a routine operation for knee pain most commonly caused by arthritis. This unique video is part of a complete module on common orthopedic surgeries displayed in 3D animation.