Distal angle of anteversion

The distal angle of anteversion is a measurement used to assess angular deformities of the femur and provide guidance for corrections. It is determined from multiplanar reconstructed CT images of the femur. A transverse plane is used to visualize the entire diaphysis of the femur as a straight cylinder by scrolling through sequential images.

A first line representing the femoral neck axis is drawn. A second line representing the transcondylar femoral axis. The point of intersection of these two lines is noted. A third line is drawn from the lesser trochanter to the point of intersection previously determined. The distal angle of anteversion is the angle between this third line and the transcondylar femoral axis.

Newman and Voss 2017 found that the distal angle of anteversion in healthy English Staffordshire Bull Terriers was 17.92 ± 3.16°.