Fig. 6.

Significant variations in both the three-dimensional orientation of the femoral neck and the femoral shape are illustrated in colour. (A) A significant difference in the orientation of the femoral neck between men (in dotted lines) and women (in solid lines) was detected. In the transverse plane, the anteversion of the femoral neck tends to be greater in women than in men, while in the frontal plane no difference was observed on the inclination of the femoral neck. No significant effect of sex was detected on the femoral shape and, thus, the mean shape conformation is illustrated. (B) The angle of anteversion tends to decrease with age. Orange dotted lines illustrate changes with age in both the shape conformation and the three-dimensional orientation of the femoral neck compared with the mean shape conformation as illustrated in blue solid lines.