knee arthroplasty is a surgical procedure that involves replacing a damaged or worn-out knee joint with an artificial implant. This surgery is commonly performed on patients suffering from conditions like osteoarthritis or rheumatoid arthritis, which can cause severe pain and limit mobility. The goal of the procedure is to relieve pain and restore function to the knee. During the surgery, the surgeon removes the damaged cartilage and bone from the knee joint and replaces it with a prosthetic joint made of metal and plastic. Recovery typically involves physical therapy to help regain strength and movement, allowing patients to return to their daily activities.