What is DISI wrist?

Dorsal intercalated segment instability (DISI) is a form of instability involving the wrist. It occurs mainly after the disruption of the scapholunate ligament and is more often encountered than volar intercalated segment instability (VISI).

What is Lunotriquetral ligament?

The lunotriquetral (LT) ligament is an intrinsic ligament of the wrist, more particular an interosseous carpal ligament which provide stability to the proximal carpal row. This ligament has a thin, horseshoe- shaped structure and can be divided into three parts: a dorsal, a proximal and a volar one.

How do you fix a torn ligament in your wrist?

Rupture to the ligaments of the wrist can be repaired by pinning, reconstruction, or fusion depending on the severity and amount of time that has lapsed since injury. If surgery is performed within three months of injury pinning may be the best option.

What is a SLAC wrist deformity?

Scapholunate advanced collapse (SLAC) is a characteristic degenerative clinical wrist condition of progressive deformity, instability, and arthritis that affects the radiocarpal and mid-carpal joints of the wrist.

What are the DISI and Visi abnormalities of the wrist?

DISI and VISI abnormalities of the Wrist – YouTube Understanding Dorsal vs Volar Intercalated Segment Instability of the carpal bones. Normal Scapholunate angle: 30-60º

How are joint position sensors injured in Disi wrist?

The joint position sensors are almost always injured when there is an injury to ligament and joint capsule. Proprioception retraining is essential to regaining normal function in a DISI wrist post operatively. It also helps to prevent future re-injury.

What does Disi stand for in medical terms?

Associated injuries. DISI (dorsal intercalated segmental instability) 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

How many carpal bones are there in Disi deformity?

In addition to DISI deformity, there is also VISI deformity (Volar Intercalated Segment Instability). However, this is much less common. There are eight carpal bones in the wrist joint. They are divided into two imaginary rows that lie adjacent to each other and together they form the transition from the forearm to the hand.