Abstract
Many older individuals suffer from chronic knee joint pain due to osteoarthritis, a degenerative joint disease. Total knee arthroplasty (TKA), also known as total knee replacement, is a surgical procedure designed to replace a damaged knee joint with artificial implants. TKA can significantly reduce or eliminate this pain. However, depression or cognitive decline may affect the therapeutic outcome of TKA in older individuals. When performing TKA in older people, it is necessary to screen for and address mental function.