Fig. 2

Schematic diagram of the measurement process in the coronal structural position matching of the distal radius. Fig. a-c maps the medial wall of the distal radius as the central axis. Fig. d maps a horizontal plane based on the most ulnar point of the lunate in the standard orthogonal position. Fig. e projects the outline of the lunate (blue line) and the medial wall of the radius (red line) on the horizontal plane through which the most ulnar point of the lunate passes. Fig. f maps the ulnar and radial protrusions of the lunate from the horizontal plane to the medial radius, resulting in a vertical distance