Related Experiment Videos
Histologic anatomy of the triangular fibrocartilage
L K Chidgey1, P C Dell, E S Bittar
1University of Florida, Department of Orthopaedics, Gainesville 32610.
The Journal of Hand Surgery
|November 1, 1991
Summary
The triangular fibrocartilage complex has unique collagen fiber arrangements. The radioulnar ligaments and outer disk are vascularized, but the central disk lacks blood supply.
Area of Science:
- Orthopedics
- Anatomy
- Biomaterials Science
Background:
- The triangular fibrocartilage complex (TFCC) is crucial for wrist stability.
- Understanding its collagenous structure is key to diagnosing and treating wrist injuries.
Purpose of the Study:
- To elucidate the collagen fiber arrangement within the TFCC.
- To investigate the vascularity of different TFCC components.
Main Methods:
- Analysis of 20 fresh cadaver wrists using light microscopy and scanning electron microscopy.
- India ink injection to assess vascularization patterns.
Main Results:
- Collagen fibers in the articular disk are arranged in oblique, undulating sheets.
- Radioulnar ligament fibers run longitudinally from radius to ulna.
- The peripheral TFCC (15-20%) and ligaments are vascularized; the central disk (80%) is avascular.
Conclusions:
- The TFCC exhibits distinct collagenous architecture and regional vascularity.
- These findings provide insights into TFCC biomechanics and healing potential.