评估腕关节三角纤维软骨复合体 [TFCC] 的组织形态学和显微构成:尸体观察研究

V. D. Kumar, Nandini Rajaram
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引用次数: 0

摘要

位于腕部尺侧的 TFCC 结构复杂,由多个不同的解剖实体组成,共同在腕部生物力学中发挥着重要作用。印度人尚未对 TFCC 的解剖结构进行广泛研究。本研究采用血色素-伊红和 Verhoff Van Gieson 染色法,阐明腕关节三角纤维软骨复合体的显微解剖结构和组成。从 40 个标本(20 个右肢和 20 个左肢)中采集的样本放入 10% 中性缓冲福尔马林中固定。制备石蜡包埋块,并制作 7 微米厚的组织切片。切片按照标准化方案进行 H&E 和 VVG 染色。对三角形纤维软骨复合体七个组成部分的形态结构进行了评估。关节盘由密集交错的纤维软骨组成,血管稀疏。桡侧韧带显示出密集的平行或交错胶原束。在尺骨伸肌鞘下、尺骨-三股韧带(UTL)和尺骨-月骨韧带(ULL)中可观察到紧密和疏松的混合平行组织。尺-腕半月板(UCM)的形态组成不规则,结缔组织疏松。在尺桡韧带外筋膜/筋膜区、尺桡韧带间隙区和尺桡半月板间隙区观察到血管。由于 TFCC 的实体性质各不相同,因此其显微解剖非常复杂。了解结缔组织、血管和弹性纤维的分布将对关节镜手术的规划大有帮助。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Assessing the histomorphology, and microscopic composition of the triangular fibrocartilage complex [TFCC] of the wrist joint: A cadaveric observational study
TFCC, being a complicated structure, located on the ulnar side of the wrist is composed of multiple distinct anatomic entities which together play a critical role in wrist biomechanics. The anatomy of TFCC has not been extensively studied in the Indian population. To elucidate the microscopic anatomy and composition of the triangular fibrocartilage complex of the wrist joint using haematoxylin-eosin and Verhoff Van Gieson staining methods. Samples collected from 40 specimens (20 right and 20 left limbs) were placed in 10% neutral buffered formalin for fixation. Paraffin-embedded blocks were prepared and tissue sections were taken at 7-micron thickness. The slides were subjected to H&E and VVG staining following standardized protocol. The morphological structure of the seven components of triangular fibrocartilage complexes was assessed. The articular disc consisted of densely packed interlaced fibrocartilage with sparse blood vessels. Radioulnar ligaments showed densely-packed-parallel or interlaced- collagen-bundles. A mixture of tight and loose parallel tissue was observed in the sub-sheath of the extensor carpi ulnaris muscle, the ulnar-triquetral (UTL), and the ulnar-lunate ligament (ULL). Irregular morphological composition and loose connective tissue predominated in the ulnar-carpal meniscus (UCM). Blood vessels were observed in the epi-fascicular/ fascicular areas of the UTL, interstitial region of ULL and UCM. The microscopic anatomy of TFCC was complex owing to the varied nature of its entities. An understanding of the distribution of connective tissue, blood vessels, and elastic fibres would be of immense help in planning arthroscopic procedures.
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