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Journal of Korean Neurosurgical Society > Volume 12(4); 1983 > Article
Journal of Korean Neurosurgical Society 1983;12(4): 731-737.
Pseudospondylolisthesis (Review of 22 Cases).
Jong Hoon Chung, Suck Jun Oh, Hae Dong Jho, Yung Rak Yoo, Nam Kyu Kim, Hwan Yung Chung
Department of Neurosurgery, Hanyang University, School of Medicine, Seoul, Korea.
Study of 22 cases with the pseudospondylolisthesis established that it occurred more frequently in the older women, and far more frequently at the L4 level, as same results as reported by others. The slipping occurred as a result of degenerative disease of the articular process and facet joint, but it never exceeded 25% in this series. This study was performed to recognize the stability of the lumbosacral joint by the measurement of the anterior and posterior vertical heights(deformity) of the body of the L5 vertebra and lumbosacral angles in our cases. We also attempted to observe whether the facet angle changes at the involved level was meaningful or not. Result : lumbosacral angles in the our patients with pseudospondylolisthesis were increased greater than normal, so lumbar lordosis was less than normal. The body of the L5 vertebra was not as wedged anteroposteriorly as it normally was. The contour of the body of the L5 vertebra resembled rectangle shape. The pedicle-facet angles were increased at involved level, but this measurement was not correctly demonstrated on the plain roentgenograms.
Conclusion :
The stability of the lumbosacral joint in the patients with pseudospondylolisthesis was increased due to rectangle shape of the body of the L5 vertebra and less lumbar lordosis. The pedicle-facet angles at the involved level were increased, but not correct diagnostic values.
Key Words: Pseudospondylolisthesis; Lumbosacral angle; Pedicle-facet angle
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