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It is caused by rupture of the ligaments between radius, scaphoid, lunate and capitate bones. The scaphoid has lost its stabilizing function as a bridge between the proximal … Scapholunate dissociation: Involves a complete tear of the SLIL with additional tear of 1 or more secondary ligaments. The scaphoid usually rotates into flexion, and the lunate rotates into extension. This is apparent on plain static radiographs. Scapholunate dissociation is the most common form of wrist instability, defined as “the loss of synchronous motion or normal alignment between the scaphoid and the lunate”.

Scapholunate dissociation

There is increased distance of greater than 5 mm (black arrow) between the scaphoid (S) and the lunate (L) producing the so-called Terry Thomas or David Letterman sign. For these same photos without the arrows, click here For more information, click on the link if you see this icon Scapholunate (SL) instability is the most common dissociative carpal instability condition. It is the most frequent cause of wrist osteoarthritis, defined as scapholunate advanced collapse or SLAC wrist. Familiarity with the SL ligament complex is required to understand the various features of SL instability. Scapholunate dissociation is the most common form of wrist instability, defined as “the loss of synchronous motion or normal alignment between the scaphoid and the lunate”. 1 The mechanism of injury is typically a fall with the wrist extended and in ulnar deviation. Scapholunate Ligament Tear Signs, Symptoms and Treatment What is Scapho-lunate ligament injury?

Scapholunate Dissociation - 603034-01XG. Price: From $395.00 to $590.00. Product Options:.

: Handled frakt. Distal radie, ulna och carpal Frakturer 2021

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Any of the following signs may be seen: Widening of the scapholunate joint space >3mm. Known as Terry-Thomas sign (or David Letterman sign) Rotary subluxation of the scaphoid. Lateral view: Scapholunate angle >60 degrees.

Scapholunate ligament repair alone leads to failure and progression of scapholunate advanced collapse We have reviewed prospectively 44 cases of chronic scapholunate dissociation treated by Blatt’s dorsal capsulodesis.
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Known as Terry-Thomas sign (or David Letterman sign) scapholunate dissociation causes the scaphoid to flex palmar and the lunate to dorsiflex if left untreated the DISI deformity can progress into a SLAC wrist DISI deformity may also develop secondary to distal pole of the scaphoid excision for treatment of STT arthritis DISI is a form of carpal instability dissociative Scapholunate dissociation: Involves a complete tear of the SLIL with additional tear of 1 or more secondary ligaments.

Carpal instability secondary to scapholunate (SL) ligament tears can lead to a significant disability of the wrist. Different surgical procedures have been proposed to treat SL instability. A variety of dorsal capsulodesis techniques tethering the scaphoid have been used in patients with SL dissociation. Se hela listan på sportsmd.com No clear consensus exists on the best treatment for patients with chronic symptomatic scapholunate dissociation uncomplicated by arthritis.
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1. 46yo male presents with chief complaint of left wrist pain. Patient slipped on side walk on sheet of ice and fell scapholunate dissociation.

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Scapholunate dissociation. Scapholunate dissociation is the most common carpal instability. Scapholunate instability is associated with increased scaphoid flexion and pronation with associated lunate extension.