Abstract
Using a digital vernier calliper, measurements of the position of the centre of the distal radial articular surface in the sagittal plane with respect to the long axis of the distal radius were made on 50 lateral radiographs of normal wrists. In all 50 cases, the centre of the distal radial articular surface was palmar on the long axis of the radius. The mean value for this palmar position was 5.3 mm (44% of the radial shaft width). There was no correlation between the position of the centre of the distal radial articular surface and either the width of the radial shaft, the length of the articular surface of the distal radius or the age or sex of the individuals. However, the position of the centre of rotation was found to correlate with palmar tilt. The palmar position of the centre of the distal radial articular surface on the long axis of the radius may be biomechanically important.
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