X-ray of scapholunate instability

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Author: Mikael Häggström [notes 1]


Required projections are posterior anterior (PA), a lateral view X-ray, and then either fist view X-ray[1] or X-rays in ulnar and radial deviation.


Measure the scapholunate distance. A distance of more than 3 mm, which is called scapholunate dissociation.[2] A static instability is generally readily visible, but a dynamic scapholunate instability can only be seen radiographically in certain wrist positions or under certain loading conditions, such as when clenching the wrist, or loading the wrist in ulnar deviation.[3]


  • Presence or absence of scapholunate dissociation. If present, specify if it is static, or in which positions it appears.
See also: General notes on reporting


  1. For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Radlines:Authorship for details.


  1. Novelline, RA (2004). Squire's fundamentals of radiology, 6th Edition (6th ed.). United States of America: President and fellows of Harvard college. ISBN 0-674-01279-8. 
  2. Owen Kang and Henry Knipe et al.. Scapholunate advanced collapse. Radiopaedia. Retrieved on 2018-01-05.
  3. Fairplay, Tracy; Cozzolino, Roberto; Atzei, Andrea; Luchetti, Riccardo (2013). "Current Role of Open Reconstruction of the Scapholunate Ligament ". Journal of Wrist Surgery 02 (02): 116–125. doi:10.1055/s-0033-1343092. ISSN 2163-3916.