The bone was surrounded by three plates of the prothesis, when a right triangle was made from the three plates on the transverse section of the bone.

• [方法] 利用计算机辅助技术，根据结构力学原理，设计带孔槽的皮质外固定式三板假体，使三块板包绕固定在骨皮质外，在骨的横截面上组成等边三角形；