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Long-term outcomes of ilio-sacral screws in minimally invasive bipolar fusionless technique for neuromuscular scoliosis: a retrospective study in 167 patients

  • Orthopaedic Surgery
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A Correction to this article was published on 09 February 2022

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Abstract

Introduction

Pelvic fixation in patients with neuromuscular scoliosis is difficult, due to their fragile general condition and poor bone quality. Many techniques have been described, associated with high rates of mechanical complications. The objective of this work was to evaluate the mechanical complications and long-term radiological results of ilio-sacral screw pelvic fixation.

Materials and methods

167 consecutive patients with neuromuscular scoliosis who underwent minimally invasive bipolar fixation with ilio-sacral screw pelvic fixation were retrospectively reviewed. The instrumentation consisted in a bilateral sliding rods construct extended from T1 to the sacrum, anchored proximally by double-hook claws and distally by ilio-sacral screws through a minimally invasive approach. Mechanical complications and radiographic measurements (angle of the major coronal curve, pelvic obliquity, lumbar lordosis) were evaluated preoperatively, postoperatively, and at the last follow-up.

Results

Mean operative age was 12 ± 3 years, and follow-up 6.4 years (3.0–10.4 years). Pelvic obliquity decreased from 20° preoperatively to 5° (77% correction) at last follow-up, Angle of the major coronal curve from 75° to 36° (52% correction), and lumbar lordosis from 28° to 38°. 16 mechanical complications in nine patients occurred: screw prominence (n = 1), connector failure (n = 4), screw malposition (n = 11). Unplanned surgery was required in seven cases, two were managed during rod lengthening, seven did not require treatment.

Conclusion

In this series of neuromuscular patients operated by ilio-sacral screws as pelvic fixation, the results were stable with a mean follow-up of more than 6 years and the complication rate was reduced comparatively to the literature.

Level of evidence

4

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Funding

Euros® is the manufacturer of the ilio-sacral screws. It had no role in the design of the study, collection of the data, analysis or interpretation of the results, writing of the article, or decision to submit it. No author of this article received any financial or nonfinancial contribution related to this study.

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Authors and Affiliations

Authors

Contributions

MG: study design, statistics, data interpretation, manuscript drafting, and approval of the final version to be published. PG: study design, statistics, manuscript drafting and revision for important intellectual content, and approval of the version to be published. NK: approval of the final version to be published. PG: approval of the final version to be published. JDD: revision for important intellectual content and approval of the final version to be published. LM: study design, manuscript drafting, revision for important intellectual content and approval of the final version to be published.

Corresponding author

Correspondence to Lotfi Miladi.

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Conflict of interest

L. Miladi has intellectual property rights with Euros company.

Ethical approval

CPP, ID-EUDRACT # 2014 A019043 44.

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Informed consent was obtained from all participants.

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Gaume, M., Gerard, P., Khouri, N. et al. Long-term outcomes of ilio-sacral screws in minimally invasive bipolar fusionless technique for neuromuscular scoliosis: a retrospective study in 167 patients. Arch Orthop Trauma Surg 143, 1761–1767 (2023). https://doi.org/10.1007/s00402-021-04332-x

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