What Is The Lifespan of Knee Replacement Surgery? Knee replacement surgery has helped millions of patients regain mobility and reduce pain. The surgery is generally advised when knee pain, stiffness, and degeneration begin affecting daily activities. Patients frequently wonder how many years their knee implant will continue to function effectively. https://www.diigo.com/item/note/b2kov/q6pb?k=dbcf722048a74abd1c915e420fa50d99