Fig. 2

Standard (postero-anterior and lateral view) radiographs showing normal measurements of the distal radius. Palmar tilt (PT) of the radius can be measured by obtaining the angle of intersection between a line drawn tangentially across the most distal points of the radial articular surface and a perpendicular to the midshaft of the radius. Radial inclination (RI) is the angle of the distal radial surface with respect to a line perpendicular to the shaft. Radial height (RH) is the distance between two parallel lines drawn perpendicular to the long axis of the radial shaft, one from the tip of the radial styloid and the other from the ulnar corner of the lunate fossa. Ulnar variance (UV) refers to the relative lengths of the distal articular surfaces of the radius and ulna.