Epiphyseal fusion observes the growth, development, and fusion at the ends of the bone. In juveniles, the long shaft and epiphysis ends are separate to allow growth of structure and fuse together. The rate of fusion can be used to determine the age of development for a child. Epiphyseal suture closes at the end of the long bones. Different skeletal elements fuse at different ages and ends around the age of twenty-four with the clavicle bone.