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Japanese

Relationship between Radiological Instability of the Lumbar Spine and Age Tetsuhiro Iguchi 1 , Koichi Kasahara 1 , Aritetsu Kanemura 1 , Junya Akaura 1 , Keizo Sato 1 , Kenjiro Ito 1 , Akira Kurihara 2 1Department of Orthopaedic Surgery, Kobe Rosai Hospital 2Nishi Hospital Keyword: lumbar instability , 腰椎不安定性 , age , 年齢 , disc degeneration , 椎間板変性 pp.535-541
Published Date 2004/4/1
DOI https://doi.org/10.11477/mf.1408100427
  • Abstract
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 Purpose:Little is known about the relationship between radiological instability and age except in regard to degenerative spondylolisthesis. The purpose of this study was to clarify the relationships between radiological factors of lumbar instability in the sagittal plane and age in a multi-generation study.

 Methods:More than 3 mm slip in the neutral position, more than 3 mm sagittal translation, and more than 10 degrees of segmental angulation were defined as excessive motion at the L4/5 segment. In the 1647 patients visited our institute because of low back or leg pain during 1996-97, patients with conditions which might impede accurate measurement of instability at the L4/5 segment were excluded. Remained 880 patients (389 men and 491 women) with an average age:of 49±18 years. ranged 14 to 84 were divided into 15 groups at 5-year intervals and the proportion of patients with excessive motion in the each group was determined.

 Results:The mean age of the patients with excessive angulation, translation, and slip in neutral position was 42, 50, and 63 years, respectively. Both the proportion with excessive angulation and translation showed two-peak pattern with one peak in the teen and twenties groups and the other in the over 46 age groups, but angulation was predominant in the younger age groups and translation was predominant in the older age groups. Slip in neutral position was more common in the age groups over 46 years, and the proportion increased with age.

 Conclusion:The existence of patients with excessive angulation and translation in the younger age groups suggests that they have a hypermobile segment with less disc degeneration. Because the proportion with the slip in the neutral position increased with age, this pathology was considered to be irreversible. Different patterns of these radiological factors may be caused by the progression of the aging process of the instability.


Copyright © 2004, 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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