After open-heart surgery, for the steel wire used to suture the sternum, it is recommended to remove it after the sternum has completely healed, if there are no special circumstances. Because the wire is a foreign body, if it is left in the body for a longer period of time, the body may have a rejection reaction to it. If the rejection reaction occurs accidentally, local soft tissues or bones will show symptoms such as swelling and pain, and in serious cases, inflammatory discharge or purulent infection will appear. Therefore, if it is clear that the bone has completely healed, 2 surgeries can be performed to remove it after 1-1.5 years after the suture of the sternum is reexamined by X-ray or CT.