Healthy knee joints are crucial to staying active. As we age, our knees can degenerate, become painful, and slow us down. Non-operative treatment may be initiated at first, but when all conservative treatment is exhausted, total or partial knee replacement may be recommended. Joint replacement has become a very successful procedure. After a full recovery, patients can enjoy less pain and more function. Rehabilitation is often necessary to fully recover from any knee surgery to restore flexibility and strength.