When removing a cortical graft from the outer table, first outline the area with an osteotome or power saw.Then peel the graft up by slight prying motions with a broad osteotome.

• 从髂骨外板切取皮质骨块时，先以骨凿或动力锯切割出取骨范围，然后再以宽骨凿轻撬取下骨块。