INVESTIGATION OF THE LAMINATE STRUCTURE OF LUMBAR-DISK ANULUS FIBROSUS
INVESTIGATION OF THE LAMINATE STRUCTURE OF LUMBAR-DISK ANULUS FIBROSUS
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DOI：
10.1097/00007632-199005000-00011
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发表时间：
1990-05-01
期刊：
影响因子：
3
通讯作者：
AHMED, AM
中科院分区：
文献类型：
--
作者：
MARCHAND, F;AHMED, AM
采用逐层剥离技术和不同切面的显微镜检查，对腰椎间盘纤维环的结构进行了研究。对L2-3和L4-5两个不同年龄段的脊柱标本进行了观察。对椎体-椎间盘-椎体单位进行有意的控制脱水，以增强白色不透明纤维束和半透明基质之间的视觉对比度。研究了环状结构随周向和径向位置的变化。量化了以下主要结构特征：(1)环(不包括过渡区)由15-25个不同的层组成，取决于周向位置、脊柱水平和标本年龄；(2)任何20度。在圆周扇区，近一半的层终止或起源，从而导致局部层状不规则性；(3)在这些不规则性处存在两种可识别的层中断机制；(4)各层的厚度沿周向和径向变化，并随年龄显著增加；以及(5)在盘的总高度上纤维束的数量从20到62个变化，平均束间距为0.22 mm。
The structure of the lumbar disc anulus fibrosus was investigated using a layer-by-layer peeling technique and microscopic examination of various cut surfaces. Anulus specimens from spines of two different age groups and from two levels, L2-3 and L4-5, were examined. The vertebra-disc-vertebra units were subjected to intentional controlled dehydration to enhance the visual contrast between the white opaque fiber bundles and the translucent ground substance. The variations of the anulus structure with circumferential and radial locations were studied. The following principal structural features were quantified: (1) the anulus, excluding the transition zone, consists of 15 to 25 distinct layers, depending on the circumferential location, the spine level, and the specimen age; (2) in any 20.degree. circumferential sector, nearly half of the layers terminate or originate, thereby causing local laminate irregularities; (3) there are two identifiable mechanisms of layer interruption at these irregularities; (4) the thickness of individual layers varies both circumferentially and radially and increases markedly with age; and (5) the number of fiber bundles over the total height of the disc varies from 20 to 62, with an average interbundle spacing of 0.22 mm.