Fig. 1

Postoperative x-ray film showing the measurement of radiographic parameters. a Volar tilt was the angle between the line along the distal radial articular surface and the line perpendicular to the longitudinal axis of the radius at the joint margin. b Radial inclination was the angle formed between the long axis of the radius and a line drawn from the distal tip of the radial styloid to the ulnar corner of the lunate fossa. c We identified the long axis of the radius and drew a line perpendicular to this, extending through the ulnar-most corner of the lunate fossa. Ulnar variance was the distance between this line, and the distal-most point of the ulnar dome was recorded as the ulnar variance