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Relationship Between Postoperative Changes in the Adjacent Craniad Segment after Lumbar Fusion and the Preoperative Adjacent Facet Angle Hideki Shigematsu 1 , Yurito Ueda 1 , Munehisa Koizumi 1 , Kiyoshi Miyazaki 1 , Nobuhisa Satoh 1 , Hiroaki Matsumori 1 , Takuya Ooshima 1 , Yoshinori Takakura 1 1Department of Orthopedic Surgery, Nara Medical University Keyword: posterolateral fusion , 後側方固定術 , facet angle , 椎間関節角度 , instrumentation , インストゥルメンテーション pp.1169-1174
Published Date 2006/11/1
DOI https://doi.org/10.11477/mf.1408100973
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 We retrospectively evaluated 17 patients, 6 men and 11 women, mean age 61.2 years, treated by a combination of posterolateral fusion and instrumentation. In this study L3-4 was craniad segment adjacent to the fusion. The radiological criteria we used for L3-4 segment degeneration were disc height narrowing greater than 3mm, posterior opening greater than 5°, and progression of slippage greater than 3mm in comparison with plain preoperative flexion and extension lateral radiographs. Based on the above criteria the patients were divided into a group L3-4 degeneration (Group Ⅰ), and a group without L3-4 degeneration (Group Ⅱ). We measured the facet angle at L3-4 in each group and compared it between the two groups. The facet angle in GroupⅠwas larger than in Group Ⅱ, but no statistically significant difference was found in this study. Because of the small number of patients in each group, caution must be exercised in drawing any definite conclusions about the effect of the angle on segment degeneration. Larger differences in the variables may be found in a larger series of patients.


Copyright © 2006, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1286 印刷版ISSN 0557-0433 医学書院

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