Volar Lunotriquetral Ligament

ligamentum lunotriquetrale palmare

The volar lunotriquetral ligament is the palmar component of the lunotriquetral ligament complex, running from the palmar lunate to the palmar triquetrum. It is stronger than the dorsal component and the primary restraint to lunotriquetral separation.

Region: Forearm

Biomechanics

Function & Actions

Primary palmar restraint to lunotriquetral dissociation; prevents volar triquetral displacement; resists torsional forces at the lunotriquetral joint.

Clinical Relevance

Clinical Notes

Lunotriquetral ligament tears produce ulnar-sided wrist pain with a characteristic catch-up clunk on wrist ulnar deviation. The volar component is the stronger, more clinically significant portion. The LT shear test (Kleinman test) specifically stresses the lunotriquetral joint. MRI arthrography identifies volar LT tears at the lunotriquetral interval. Arthroscopic debridement is first-line; ligament reconstruction is reserved for volar instability.

Pathology

Common Injuries & Conditions

Volar Lunotriquetral Ligament Tear

Palmar LT ligament disruption from forceful wrist hyperextension producing ulnar wrist pain and a clunk with ulnar deviation, confirmed by arthroscopy and managed by debridement or ligament reconstruction.