The scapholunate ligament is the wrist ligament.
The breakdown of the scapholunate ligament causes scapholous instability, which, if left untreated, will eventually lead to a wrist osteoarthritis inflammatory pattern called scapholunate advanced collapse (SLAC).
Video Scapholunate ligament
Anatomy
The scapholunate ligament is an intraarticular ligament that binds the scaphoid bone and sickle from the joint wrist. It is divided into three areas, dorsal, proximal and palmar, with the dorsal segment being the strongest part. This is the main stabilizer of the scaphoid. In contrast to the scapholunate ligament, the lunotriquetral ligament is more prominent on the palmar side.
Maps Scapholunate ligament
Instability
This ligament rupture causes wrist instability. The main type of instability is the instability of the dorsal distortion segment (DISI), where the crescent moon is leaning to the posterior side of the hand.
A dynamic scafastic instability is where the scapholunate ligament is completely ruptured, but secondary scaphoid stabilizers are retained. These are scaphotrapezial (ST), scaphocapitate (SC) and radioscaphocapitate (RSC) ligaments. In static instability , on the other hand, other ligaments are also broken.
Diagnosis
The Watson test can be used in diagnosis.
Xray shows scapholunate ligament instability when scapholunate distance is more than 3 mm, called scapholunate disociation . Static instabilities are generally easily visible, but dynamic dynamic instabilities can only be seen radiographically at certain wrist positions or under certain loading conditions, such as when clenching the wrist, or loading the wrist hand in ulnar irregularities.
To diagnose wrist SLAC you need an anterior posterior image (PA) X-ray, lateral X-ray image and X-ray view of boxing. X-ray fist is often made if there is no sure sign of Terry Thomas. X-ray beats of scapholunate ligaments will show decreased capitation. Making a fist will put pressure on capitation, which will come down if there is a ruptured scapholunate ligament.
Treatment
Treatment will vary depending on the extent of the injury and may range from observation, to wrist surgical reconstruction.
Complications
Finally, untreated scapholunate instability generally leads to a predictable pattern of osteoarthritis of the wrist called scapholunate advanced collapse (SLAC). SLAC is present in approximately 85% of cases of untreated scaphic instability after 36 months.
References
Source of the article : Wikipedia
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