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X-ray of scapholunate instability

1,649 bytes added, 13:39, 30 May 2018
From material I previously added to Wikipedia
{{Authors
|author1=[[User:Mikael Häggström|Mikael Häggström]]
|author2=
}}

==Planning==
In order to diagnose a SLAC wrist you need a posterior anterior (PA) view X-ray, a lateral view X-ray and a fist view X-ray.<ref name="RANovelline">{{Cite book|last=Novelline|first=RA|title= Squire's fundamentals of radiology, 6th Edition
|publisher= President and fellows of Harvard college|location= United States of America|year=2004|edition=6th|isbn=0-674-01279-8}}</ref>

==Diagnosis==
Scapholunate ligament instability is indicated when the ''scapholunate distance'' is more than '''3&nbsp;mm''', which is called ''scapholunate dissociation''.<ref>{{cite web|url=https://radiopaedia.org/articles/scapholunate-interval|title=Scapholunate advanced collapse|author=Owen Kang and Henry Knipe et al.|website=[[Radiopaedia]]|accessdate=2018-01-05}}</ref> 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.<ref name="FairplayCozzolino2013"/>

<gallery>
File:ScaphoLuncateDisoMark.png|''Static'' scapholunate dissociation
File:X-ray of dynamic scapholunate instability - annotated.jpg|Dynamic instability: Increased scapholunate distance (between yellow lines) upon ulnar deviation of the wrist, but not otherwise.
File:Dynamic_S-L-grip.jpg|Dynamic scapholunate instability visible upon clenching the wrist
File:Scapholunatedis.png|Scapholunate ligament disruption associated with a colles fracture
</gallery>

==References==
{{reflist}}
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