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European Spine Journal
Published in: European Spine Journal 11/2015

01-11-2015 | Original Article

L5–S1 disc degeneration and the anatomic parameters of the iliac crest: imaging study

Authors: Yong-Li Wang, Xiang-Yang Wang, Bi-Dong Fang, Yong-Long Chi, Hua-Zi Xu, Li-jun Wu, Zhong-Ke Lin

Published in: European Spine Journal | Issue 11/2015

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Abstract

Purpose

To evaluate the relationship between height ratio of the iliac crest to L4 (HR), width ratio of the iliac crest to L4 (WR) and L5–S1 disc degeneration.

Methods

On T2-weighted sagittal images of the 50 randomly selected patients, two observers graded L5–S1 discs and some other parameters were measured. Then, relative signal intensity (RSI) of the L5–S1 nucleus pulposus was calculated. On anteroposterior and lateral radiographs of the same 50 patients’ lumbar spine, the parameters such as the height of the iliac crest were measured and then HR and WR were calculated. Finally, HR, WR and the percentage of the sROM of L5–S1 in L1–S1 segments of the other 51 randomly selected patients were calculated.

Results

Positive correlations were found between HR, WR and RSI of the L5–S1 disc. Negative correlations were found between HR, WR and modified Pfirrmann scores of L5–S1 nucleus pulposus. A statistically significant negative correlation was found between HR and the percentage of sROM of L5–S1 in L1–S1 segments.

Conclusions

Low HR and (or) WR were the risk factors for L5–S1 disc degeneration. High HR could reduce the percentage of sROM of L5–S1 in L1–S1 segments and high HR and (or) WR could reduce the incidence of L5–S1 disc degeneration.
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Metadata
Title
L5–S1 disc degeneration and the anatomic parameters of the iliac crest: imaging study
Authors
Yong-Li Wang
Xiang-Yang Wang
Bi-Dong Fang
Yong-Long Chi
Hua-Zi Xu
Li-jun Wu
Zhong-Ke Lin
Publication date
01-11-2015
Publisher
Springer Berlin Heidelberg
Published in
European Spine Journal / Issue 11/2015
Print ISSN: 0940-6719
Electronic ISSN: 1432-0932
DOI
https://doi.org/10.1007/s00586-015-4076-x

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