REPIPHYSIS® Expandable Implant was designed especially for children whose bones are still growing.  The typical recipient has at least 4 centimeters of growth remaining.  Girls who receive a REPIPHYSIS® Expandable Implant are usually under 12, while boys are usually under 14.  However, REPIPHYSIS® Expandable Implant has been used in children as young as 5 as well as adults.  Once the child's bones stop growing, his or her REPIPHYSIS® Expandable Implant will eventually need to be replaced with a non-expandable endoprostheses.