Histological anatomy of the triangular fibrocartilage complex of the humanwrist

Citation
T. Nakamura et Y. Yabe, Histological anatomy of the triangular fibrocartilage complex of the humanwrist, ANN ANATOMY, 182(6), 2000, pp. 567-572
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Experimental Biology
Journal title
ANNALS OF ANATOMY-ANATOMISCHER ANZEIGER
ISSN journal
0940-9602 → ACNP
Volume
182
Issue
6
Year of publication
2000
Pages
567 - 572
Database
ISI
SICI code
0940-9602(200011)182:6<567:HAOTTF>2.0.ZU;2-4
Abstract
The triangular fibrocartilage complex (TFCC) was studied in serial histolog ical sections of the human wrist to reveal its three-dimensional fine struc ture. The TFCC consisted of a fibrocartilaginous disc proper and other fibr ous components. Three-dimensionally, the distal portion of the TFCC had a h ammock-like contour that partially surrounded the carpus; while the proxima l ligamentous portion corresponding to the radioulnar ligament connected th e radius to the ulna. The radioulnar ligament originated at the ulna from b oth the fovea and the basistyloid. The fibres first gathered and then bifur cated palmarly and dorsally, enclosing and partially coalescing with the pr oximal side of the disc before inserting around the distal rim of the sigmo id notch of the radius. The meniscus homologue, which corresponded to the u lnar internal wall of the wrist joint, was derived from a loose synovial fo ld adapting to the stresses from radioulnar deviation. The distal side of t he disc consisted of a dense population of chondrocytes in a collagen matri x, while the proximal side was rather rich in fibres directed radioulnarly. inside the TFCC were loose connective tissues. The histological arrangemen t of the TFCC is compatible with its function of supporting the carpus, sta bilizing the joints and allowing smooth motion of the wrist.