Ito S, Yamada Y, Tuboi S, Yamada Y, Muro T
Department of Orthopedic Surgery, Social Insurance Chukyo Hospital, Nagoya, Japan.
Neuroradiology. 1990;32(6):460-3. doi: 10.1007/BF02426455.
In order to study the antepriori etiologic factors of degenerative spondylolisthesis, the discograms and CTD were analyzed and the rate of disc slipping and disc indices wer evaluated in 30 cases with degenerative spondylolisthesis. (1) The characteristic S-shaped image which extended from anteroinferior to posterosuperior up to the posterior margin of a vertebral body was observed in 89.7% of slipped discs in lateral discograms. CTD revealed that this image represented a circular splitting in the external and intermediate annulus fibrosus. (2) Discographic degeneration of the discs adjacent to a slipped disc was relatively mild, and their disc indices were not significantly different from those of controls. (3) A negative correlation with r = -0.434 was found between the slipping rate and the disc index. From these results, it was postulated that the site and direction of the circular splitting in laminae of the annulus fibrosus, and the direction of the load applied to an intervertebral disc are important etiologic factors of degenerative spondylolisthesis.
为研究退变性腰椎滑脱的前期病因，对30例退变性腰椎滑脱患者的椎间盘造影和CTD进行分析，并评估椎间盘滑移率和椎间盘指数。（1）在侧位椎间盘造影中，89.7%的滑移椎间盘可见从椎体前下向后上延伸至椎体后缘的特征性S形影像。CTD显示该影像代表纤维环外层和中层的环形撕裂。（2）与滑移椎间盘相邻的椎间盘造影退变相对较轻，其椎间盘指数与对照组无显著差异。（3）滑移率与椎间盘指数之间呈负相关，r = -0.434。根据这些结果推测，纤维环板层环形撕裂的部位和方向以及施加于椎间盘的负荷方向是退变性腰椎滑脱的重要病因。
