Sternal fracture

At the embryonic stage, the sternal osteoblasts form the left and right sternum plates. Around 9 to 10 weeks, the sternum plates on both sides were fused to each other at the midline to form the overall sternum. If such fusion is not completed during embryonic development, or only partially fused, a sternal fracture is formed. According to the location and degree of the fissure, it can be divided into upper sternal fracture, lower sternal fracture and total sternal fracture.