What is the pathomechanics of the distal ulna relevant to ulnar-sided wrist pain?

Updated: Nov 22, 2019
  • Author: David M Lichtman, MD; Chief Editor: Harris Gellman, MD  more...
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Answer

Answer

The distal ulna does not articulate with the carpus. The triangular fibrocartilage complex (TFCC) serves as a cushion for the ulnar carpus and as a major stabilizer of the DRUJ. [4, 5, 6] Palmer and Werner coined the term TFCC to describe the ligamentous and cartilaginous structure that suspends the distal radius and ulnar carpus from the distal ulna. [7] The components of the TFCC include the central portion of the triangular fibrocartilage (articular disk), the dorsal radioulnar ligament, the volar radioulnar ligament, the meniscus homologue (ulnocarpal meniscus), the ulnar collateral ligament, the subsheath of the ECU, and the ulnolunate and ulnotriquetral ligaments.


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