Knee implants, also known as knee prostheses, are artificial devices used to replace damaged or worn-out knee joints. They are commonly used in patients suffering from conditions like osteoarthritis or rheumatoid arthritis, which can cause pain and limit mobility. The implants are designed to mimic the natural movement of the knee and can significantly improve quality of life. The procedure to install a knee implant, called knee arthroplasty, typically involves removing the damaged cartilage and bone, then fitting the implant into place. Recovery can vary, but many patients experience reduced pain and increased function, allowing them to return to daily activities more comfortably.