What is Triquetrolunate Dissociation?

Triquetrolunate dissociation is the second most common ligamentous cause of carpal (wrist bone) instability. It is an instability between the triquetrum and lunate bones of the wrist. It typically follows a fall onto a wrist positioned in flexion (towards the palm) and inward rotation. This causes stretching or tearing of one of the major interosseous ligaments of the wrist – the lunotriquetral ligament. Triquetrolunate dissociation typically presents as pain on the ulnar (little finger side) or dorsal (back) of the wrist.

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