The main point of my essay is to make quantitative analysis and conclude its developmental routines and consequently apply it to clinic by reconstructing the femoral neck anteversion of the DDH.

• 本文旨在通过三维CT重建髋脱位儿童患侧和正常侧股骨颈前倾角,进行定量分析,总结其发育规律,并应用于临床。