Mar 9, 2025 · Scapholunate Ligament Injury is a source of dorsoradial wrist pain with chronic injuries leading to a form of wrist instability (DISI deformity). Diagnosis is made with PA wrist radiographs showing widening of the SL joint. Diagnosis of DISI deformity can be made with lateral wrist radiographs showing a scapholunate angle > 70 degrees.

Nov 28, 2024 · Dorsal intercalated segment instability (DISI) is a form of carpal instability featuring dorsal tilt of the lunate. It occurs mainly after the disruption of the s capholunate ligament and is more often encountered than volar intercalated segment instability (VISI) .

The SL angle is an indicator of dorsal intercalated segment instability deformity (DISI). The SL angle goes between: [1] - A line through the long axis of the scaphoid bone. - A line perpendicular to the distal articular surface of the lunate bone.

Aug 23, 2005 · DISI is short for dorsal intercalated segmental instability. The intercalated segment is the proximal carpal row identified by the lunate. The term 'intercalated segment' refers to it being the part in between the proximal segment of the wrist consisting of the radius and the ulna and the distal segment, represented by the distal carpal row and ...

DISI and VISI are two of the most common malalignment patterns in carpal instability and are best identified in the lateral projection (12a).

VISI and DISI are well seen on sagittal MR images with the wrist in neutral position. Must be sure wrist is not in ulnar deviation when evaluating for DISI since this position can produce some dorsal tilt of the lunate. Evaluate for sequelae of malalignment –degenerative arthritis, crowding of …

Here is a dynamic sequence to get an idea of how the alignment changes between DISI and VISI. A scapholunate angle >60º (scapholunate ligament dissociation) and a capitolunate angle >30º (capitate displaced posteriorly) are indicative of dorsal intercalated segment instability.

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Feb 1, 2009 · 腕中关节不稳定常发生在桡骨远端骨折畸形愈合后致腕中代偿性异常排列，产生没有舟月骨分离的DISI。 腕骨异常移位和旋转的方向:VISI、DISI、尺侧移位、桡侧移位、掌侧移位、背侧移位、近端移位和远端移 ...... [治疗]鱼油对血糖控制的影响是什么？ 分为背侧镶嵌不稳定（DISI）：侧位X线片示头状骨纵轴移到桡骨纵轴背侧，月骨向背侧旋转。 腕尺侧偏移：腕关节整体向尺侧移位，腕尺距离比（CUDR）＜ 0 ﹒ 27。 Taleisnik将腕关节不稳定分为动力型.

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