Fig. 5.

Distal radius landmarks ^{10 31} : ( A ) The ulnar and radial prominences are the two most prominent volar points. ( B ) The bone of the interfossa sulcus ²⁸ was defined by drawing a line between the ulnar and radial prominence and determining the point of the volar margin of the distal radius that was furthest away from this line. ( C ) The point on the joint line directly distal to the radial prominence was defined using the vertex and intersection functions. ( D ) In anteroposterior view, perpendicular to the x-axis, the most ulnar point of the volar margin of the distal radius was marked.