股骨颈前倾角是一个临床常用的解剖概念,在小儿髋脱位的诊断、手术方式的选择及人工关节置换术后效果评价等方面具有重要指导作用,因此股骨颈前倾角测量具有较大的临床意义。 股骨颈前倾角的概念源自于1954年Billing[1]提出的股骨学特点。由于股骨颈不在股骨干的冠状面上,其长轴与股骨干冠状面所形成的角度,称为股骨颈前倾角（femoral　neck　anteversion,FNA）,即分 Femoral neck anteversion is a commonly used anatomical concept in the diagnosis of pediatric hip dislocation, the choice of surgical methods and artificial joint replacement postoperative evaluation of the effect of an important guiding role, so the femoral neck anteversion measurement has great clinical significance . The concept of anterior femoral neck derived from the 1954 Billing [1] femoral features. Because the femoral neck is not on the coronal plane of the femoral shaft, the angle formed by its long axis and the coronal plane of the femoral shaft is called femoral neck anteversion (FNA)