Since your bone surgery is extensive, it may take you around six months, at the very least, to recover from the
operation. Even if your
surgical wound has already healed, you will probably need a lot of physical therapy sessions to restore the function of your knee, and to reduce the pain. The fact that you're 62 also means that healing will be slower, compared to someone who is say, in his twenties or thirties, and had the same surgery.