Histological assessment of the triangular fibrocartilage complex

Area of Science:

• Orthopedics
• Anatomy
• Histology

Background:

• The triangular fibrocartilage complex (TFCC) is crucial for wrist stability and function.
• Understanding TFCC component morphology is vital for diagnosing and treating wrist injuries.

Purpose of the Study:

• To microscopically assess the morphological structure of the seven components of the TFCC in elderly cadaver wrists.
• To correlate the histological structure of TFCC components with their biomechanical functions.

Main Methods:

• Microscopic examination of seven TFCC components from 11 elderly cadaver wrists.
• Histological staining using Hematoxylin-Eosin and Elastica van Gieson.

Main Results:

• The articular disc comprised dense fibrocartilage, suggesting a buffering role.
• Radioulnar and ulnolunate ligaments displayed dense collagen, indicating significant stabilizing functions.
• Ulnotriquetral ligament and ulnocarpal meniscoid showed mixed tissues and less dense structures, implying reduced stabilizing roles.

Conclusions:

• TFCC component morphology varies, correlating with distinct functional roles in wrist biomechanics.
• The articular disc and specific ligaments play key roles in wrist buffering and central stabilization.