Abstract: A sternum plate set for securing a patient's ribcage following surgery and for protecting internal organs during subsequent surgical procedures. The plate set is constructed of biocompatible material intended to be implanted into a patient's body during a surgical procedure behind the sternum and to remain in contact with or as a substitute for the sternum following surgery. The plate set is slightly convex in shape on a side facing the sternum, and is provided with at least one transverse channel having a suture strand and passing therethrough. The suture strand has free ends which are equipped with curved needles and are passed through the sternum and joined together to secure the plate behind the sternum so that the plate permanently remains inside the patient's body between the sternum and internal organs.