The wrist intrinsic ligament system comprises the scapholunate and lunotriquetral interosseous ligaments connecting the bones within the proximal carpal row, providing segmental carpal bone coordination without an extrinsic attachment.
Coordinates the movement of the proximal carpal row bones as a linked unit, transmits forces between scaphoid, lunate, and triquetrum, and maintains the carpal arc integrity seen on radiographs.
Intrinsic ligament tears (SL or LT) disrupt the linked carpal row, allowing individual bone malalignment (DISI or VISI). The Mayo grading system classifies SL ligament tears by arthroscopic appearance, guiding surgical management from debridement to reconstruction.
Arthroscopic SL ligament assessment using the Mayo classification (I-IV) from partial tearing to complete disruption with carpal instability, guiding management from debridement to four-bone fusion.
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