This creation is a kind of related bone nail of what, system includes locking part, needle portion and interconnecting piece, wherein the system, needle portion is with the smooth pipe between butt, tip and Jie's what butt and the tip, and the interconnecting piece system connects the butt of the locking part and the needle portion, and has the hemisphere face towards the needle portion. 本創作係有關於一種骨釘，係包括鎖固部、針部、及連接部，其中，該針部係具有根端、尖端、及介於該根端與該尖端間之平滑管，而該連接部係連接該鎖固部及該針部之根端，並具有朝向該針部之半球面。
