STRUCTURAL VARIATION OF THE ANTERIOR AND POSTERIOR ANULUS FIBROSUS IN THE DEVELOPMENT OF HUMAN LUMBAR INTERVERTEBRAL-DISK - A RISK FACTOR FOR INTERVERTEBRAL-DISK RUPTURE
STRUCTURAL VARIATION OF THE ANTERIOR AND POSTERIOR ANULUS FIBROSUS IN THE DEVELOPMENT OF HUMAN LUMBAR INTERVERTEBRAL-DISK - A RISK FACTOR FOR INTERVERTEBRAL-DISK RUPTURE
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DOI：
10.1097/00007632-199302000-00006
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发表时间：
1993-02-01
期刊：
影响因子：
3
通讯作者：
MOTOE, T
中科院分区：
文献类型：
--
作者：
TSUJI, H;HIRANO, N;MOTOE, T
本文对10例胎儿、1例儿童和1例青年尸体的24个L3-4和L4-5椎间盘的前后纤维环层状结构进行了形态学比较。通过低倍显微镜和偏光显微镜对横切面进行观察和测量，评估1)片层束排列，2)不同片层束数量，3)不完整片层束百分比，4)纤维交错角度。前环的板层束数量多于后环。所有标本的后中环结构非常复杂，不完整/不连续的板层束比例很高，纤维交错角度较大。胎儿椎间盘后外环板层束连接疏松。本研究未测量后纤维环的强度，然而，年轻人后椎间盘破裂的风险可能受到后纤维环薄弱的固有结构变异的影响。
A morphologic comparison of the laminated structure of the anterior and posterior anulus fibrosus of lumbar intervertebral disc was made on 24 L3-4 and L4-5 discs obtained from 10 fetus, one child, and one young adult cadavers. Low power microscopic and polarized microscopic observations and measurements on the transverse sections were performed to assess 1) lamellar bundle arrangement, 2) number of distinct lamellar bundles, 3) percentage of incomplete lamellar bundles, and 4) fiber-interlacing angles. The number of lamellar bundles was greater in the anterior anulus than in the posterior anulus. A very complex structure was observed in the posterior middle anulus in all the specimens, with a high percentage of incomplete/discontinuous lamellar bundles and greater fiber-interlacing angles. Loose connection of the lamellar bundles of posterior outer anulus was observed in fetal discs. The anular strength was not measured in the present study, however, the risk of posterior disc rupture in the young may be influenced by an inherent structural variation with a weak posterior anulus fibrosus.