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Published in: Archives of Orthopaedic and Trauma Surgery 10/2019

01-10-2019 | Spinal Stenosis | Orthopaedic Surgery

Multi-segmental lumbar spinal stenosis treated with Dynesys stabilization versus lumbar fusion in elderly patients: a retrospective study with a minimum of 5 years’ follow-up

Authors: Annan Hu, Chi Sun, Yun Liang, Houlei Wang, Xilei Li, Jian Dong

Published in: Archives of Orthopaedic and Trauma Surgery | Issue 10/2019

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Abstract

Introduction

Middle- and long-term outcomes of multi-segmental lumbar spinal stenosis treated with Dynesys stabilization (DS) have rarely been reported. Older age and multi-segmental degeneration may be positive factors in achieving satisfactory outcomes following DS. The present study aimed to compare the middle- and long-term outcomes of DS with lumbar fusion for treatment of multi-segmental lumbar spinal stenosis (ms-LSS) in elderly patients.

Materials and methods

This study retrospectively analyzed patients with ms-LSS treated by DS or lumbar fusion from January 2011 to April 2013. Twenty-two patients were included in the Dynesys group, and 44 patients treated by lumbar fusion and rigid fixation were included in the fusion group. Clinical outcomes were assessed by VAS and ODI. Radiological outcomes were measured by range of motion (ROM) of stabilized segments and the proximal adjacent segment, intervertebral disc height (DH) and L1–S1 lumbar lordosis angle (LL). Modified Pfirrmann grade score was used to access disc degeneration.

Outcomes

The mean follow-up time of the Dynesys group and fusion group was 68.50 ± 6.40 and 70.14 ± 7.26 months, respectively. Baseline data were similar between the two groups. There were no significant differences between the two groups in terms of improvement of clinical outcomes (VAS and ODI). DS preserved a certain degree of ROM (3.74 ± 2.00) of surgical segments. ROM of proximal adjacent segment underwent an increase in both groups at the final follow-up. The DH of the surgical segments and proximal adjacent segment in both groups was significantly lower than that before surgery (P = 0.000). LL of both groups improved (P = 0.000), and there was no significant difference between the two groups. The modified Pfirrmann score of proximal adjacent segment of both groups increased at the final follow-up. The fusion group underwent a more significant increase (P = 0.000), whereas the inter-group difference showed no significance (P = 0.090).

Conclusion

DS is a safe and effective surgical treatment of multi-segmental lumbar spinal stenosis in the elderly population. DS preserves a certain degree of mobility of surgical segments.
Literature
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go back to reference Haddad B, Makki D, Konan S, Park D, Khan W, Okafor B (2013) Dynesys dynamic stabilization: less good outcome than lumbar fusion at 4-year follow-up. Acta Orthop Belg 79:97–103PubMed Haddad B, Makki D, Konan S, Park D, Khan W, Okafor B (2013) Dynesys dynamic stabilization: less good outcome than lumbar fusion at 4-year follow-up. Acta Orthop Belg 79:97–103PubMed
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go back to reference Lee CH, Jahng TA, Hyun SJ, Kim CH, Park SB, Kim KJ, Chung CK, Kim HJ, Lee SE (2016) Dynamic stabilization using the Dynesys system versus posterior lumbar interbody fusion for the treatment of degenerative lumbar spinal disease: a clinical and radiological outcomes-based meta-analysis. Neurosurg Focus 40:E7. https://doi.org/10.3171/2015.10.FOCUS15426 CrossRefPubMed Lee CH, Jahng TA, Hyun SJ, Kim CH, Park SB, Kim KJ, Chung CK, Kim HJ, Lee SE (2016) Dynamic stabilization using the Dynesys system versus posterior lumbar interbody fusion for the treatment of degenerative lumbar spinal disease: a clinical and radiological outcomes-based meta-analysis. Neurosurg Focus 40:E7. https://​doi.​org/​10.​3171/​2015.​10.​FOCUS15426 CrossRefPubMed
Metadata
Title
Multi-segmental lumbar spinal stenosis treated with Dynesys stabilization versus lumbar fusion in elderly patients: a retrospective study with a minimum of 5 years’ follow-up
Authors
Annan Hu
Chi Sun
Yun Liang
Houlei Wang
Xilei Li
Jian Dong
Publication date
01-10-2019
Publisher
Springer Berlin Heidelberg
Keyword
Spinal Stenosis
Published in
Archives of Orthopaedic and Trauma Surgery / Issue 10/2019
Print ISSN: 0936-8051
Electronic ISSN: 1434-3916
DOI
https://doi.org/10.1007/s00402-019-03234-3

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