A sternum closure device for closing the sternum of a patient comprising a head portion, tail portion and flexible spine portion. The head portion includes a locking tang to prevent backward movement of the spine portion once it is received and engaged in the head portion. The spine is made of a biocompatible metal coated with a biocompatible polymer along part of its length. One end of the spine is sharpened to serve as a needle. The tang pierces the polymer and locks against a serration of the spine. A method of using the sternum closure device is also disclosed.