Disc Height and Sagittal Alignment in Operated and Non-Operated Levels in the Lumbar Spine at Long-Term Follow-Up: A Case-Control Study
Anne Froholdt*, 1, 2, Jens Ivar Brox1, Olav Reikerås1, Gunnar Leivseth3
Identifiers and Pagination:Year: 2013
First Page: 258
Last Page: 263
Publisher Id: TOORTHJ-7-258
Article History:Received Date: 11/1/2013
Revision Received Date: 21/2/2013
Acceptance Date: 21/4/2013
Electronic publication date: 28/6/2013
Collection year: 2013
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.5/) which permits unrestrictive use, distribution, and reproduction in any medium, provided the original work is properly cited.
To compare lumbar disc degeneration at 9-year follow-up in patients with chronic low back pain who had instrumented lumbar fusion or no fusion.
Material and methodology:
The main outcomes were disc height and sagittal alignment measured by Distortion Compensated Roentgen Analysis (DCRA). Secondary outcome included the Oswestry Disability Index and VAS back pain.
Forty-eight patients with baseline and 9-year radiographs from L2- S1 were included. Twenty-three had lumbar fusion and 25 had no fusion. Disc height was reduced at all levels independent of fusion. No difference in disc height and sagittal alignment was observed between patients fused and not fused. There were weak correlations, ranging from 0.04 to 0.36, between clinical and radiological parameters.
Lumbar disc degeneration increased at all measured levels independent of fusion and correlated poorly with clinical outcome.