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取足月胎儿,3～5岁小儿及成人半月板各10例,从组织切片、扫描电镜显示,半月板内有纵向和横间纤维。纵向纤维量多,拧集成束,体部内的纤维束集合成纤维板层。纵向纤维的抗拉力强,因而横断损伤少见。横向纤维量大,集中成五层,分布于半月板体部的上、下表面及纵向纤维板层之间。横向纤维弱,受力后易断裂,形形半月板的纵向撕裂。严重慢性磨损易致半月板中央横向纤维层退变,形成水平劈裂。
Fetal fetus fetus, 3 to 5-year-old children and adult meniscus in 10 cases, from the tissue sections, scanning electron microscopy showed that there are longitudinal and transverse meniscus fibers. Longitudinal fiber volume, screw integrated beam, the body of the fiber bundles gathered into a fiber board layer. Longitudinal fiber tensile strength, and thus transverse injury is rare. Transverse fiber volume, concentrated into five layers, located in the upper and lower meniscus body and the vertical surface between the fiber layer. Lateral fiber weak, easy to fracture after stress, the longitudinal tear of the shape of the meniscus. Severe chronic wear easily lead to the central transverse transverse degenerative meniscus, the formation of the level of splitting.