Positive ulnar variance describes where the distal articular surface of the ulna is more distal when compared to the articular surface of the radius.
Maximum forearm pronation results in an increase in positive ulnar variance, whereas maximum forearm supination decreases ulnar variance 1.
- 2. Difiori JP, Puffer JC, Mandelbaum BR et-al. Distal radial growth plate injury and positive ulnar variance in nonelite gymnasts. Am J Sports Med. 25 (6): 763-8. - Pubmed citation
- 1. Cerezal L, Del piñal F, Abascal F et-al. Imaging findings in ulnar-sided wrist impaction syndromes. Radiographics. 22 (1): 105-21. Radiographics (link) - Pubmed citation