Abstract:

Objective　To investigate anatomic features of TFCC (Triangular Fibrocartilage  Complex) structure, for surgical treating of ulnar wrist pain induced by TFCC injuries.　Methods　30 adult cadaveric wrist specimens were involved in this study. The innervation of ulnar carpal soft tissues and TFCC was observed. Structure, origin and attachment of the ligaments around TFC were also studied.　Results　(1) The ligaments around TFC included ulnounate ligament, ulnotriquetrum ligament, both attached to the volar side of the corresponding carpal bones, collateral ulnar ligament, distal radioulnar ligament, radioulnar triquetral ligament and the sheath of the extensor carpi ulnaris. In addition, dorsal ulnounate ligament and dorsal ulnotriquetrum ligament could be found. (2) The innervation of ulnar carpal soft tissues and TFCC was from the branches of ulnar nerve.　Conclusions　The ulnounate and ulnotriquetrum ligaments attach to both volar and dorsal side of corresponding carpal bones. The innervation of ulnar carpal soft tissues and TFCC is from dorsal branches of ulnar nerve. Ulnar wrist pain can be treated by the selected enervation.

Key words: TFCC, Ulnar wrist pain, Ligaments, Ulnar nerve