Knee replacement is surgery to remove damaged sections of the knee joint and replace them with artificial (prosthesis) parts. This is also known as knee arthroplasty. This surgery is for patients who have joint pain that interferes with daily activities, and non-surgical treatments have not helped, or are no longer effective. The American Academy of Orthopaedic Surgeons provides insight into the decision to choose knee replacement surgery: The decision to have total knee replacement surgery should be a cooperative one between you, your family, your primary care doctor, and your orthopaedic