الفهرس 
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Abstract
The consequences of negative ulnar variance are increased force applied to the radial side of the wrist and to the lunate bone, which may explain the association of negative ulnar variance and Kienbock’s disease. With such variance, the triangular fibrocartilage complex (TFCC) is thicker, and degeneration of the TFCC are uncommon. A consequence of positive ulnar variance, is the ulnar impaction syndrome, with resulting limitation of rotation. The TFC is thinner in instances of positive ulnar variance, with possible degenerative perforation. Clearly, a standard radiographic view is necessary to help reliably determine ulnar variance. The generally accepted standard view is a posteroanterior view obtained with the wrist in neutral forearm rotation, the elbow flexed 90° and the shoulder abducted 90°. Ulnar shortening or radial lengthening have been of benefit for conditions associated with positive ulnar variance, this includes ulnolunate impingement and triangular fibrocartilage tears. Ulnar shortening is of primary value in decompressing those impingement problems as well as to change the bearing surfaces. Ulnar lengthening or radial shortening have been of benefit for conditions associated with negative ulnar variance, this includes kienbock disease. DRUJ arthritis can be treated by sauve-kapandji or Darrach techniques and ulnar head replacement arthroplasty.