Fig. 5From: Three-dimensional morphological analysis of the femoral neck torsion angle—an anatomical studya–d The methods for defining the femoral neck axis. a The method described by Zhang YL et al. [3]. b The method described by Morvan et al. [4]. c The method reported by Nakanishi et al. [5]. d The method reported by Bonneau N et al. [16]Back to article page