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Related Experiment Video

Updated: Sep 7, 2025

Multilevel Oblique Lumbar Interbody Fusion in Degenerative Lumbar Disc Disease with Instability
11:30

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Lumbar Dynamic Stabilization With 2-Stage Surgery: Early Results.

Ali Fahir Özer1,2, Ahmet Tulgar Başak2, Muhammet Arif Özbek3

  • 1Neurosurgery Department, Koc University School of Medicine, Istanbul, Turkey alifahirozer@gmail.com.

International Journal of Spine Surgery
|June 21, 2022
PubMed
Summary

This study shows that a two-stage Dynesys dynamic stabilization surgery effectively prevents screw loosening and improves patient outcomes. The procedure significantly reduces pain and disability, with no complications observed.

Keywords:
2-stage surgerydynamic stabilizationdynesysosteointegration

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Area of Science:

  • Spinal surgery
  • Orthopedics
  • Biomedical engineering

Background:

  • Screw loosening is a significant challenge in spinal dynamic stabilization systems.
  • Two-stage surgical approaches can potentially mitigate this issue.
  • The Dynesys device is utilized for dynamic spinal stabilization.

Purpose of the Study:

  • To evaluate the clinical and radiological outcomes of a two-stage Dynesys dynamic stabilization procedure.
  • To assess the efficacy of this approach in preventing screw loosening.
  • To determine the impact on patient pain and disability.

Main Methods:

  • A retrospective study of 23 adult patients (10 male, 13 female) aged 65.6 years undergoing two-stage Dynesys stabilization between 2018-2021.
  • First stage involved pedicle screw insertion; second stage, after 6 months, included spacers and elastic bands.
  • Preoperative and postoperative Visual Analog Scale (VAS) pain scores and Oswestry Disability Index (ODI) were compared.

Main Results:

  • Average follow-up was 30 months, with no observed complications, recurrence, or neurological deficits.
  • Significant improvements in ODI (66.2% to 6.8%) and VAS (7.8 to 1.1) scores were noted from preoperative to late postoperative periods.
  • Radiological evaluation revealed no screw breakage or loosening throughout the follow-up.

Conclusions:

  • A two-stage Dynesys dynamic stabilization approach effectively addresses screw loosening issues.
  • This technique leads to substantial symptomatic improvement and enhanced functional outcomes.
  • The method appears safe and reliable for managing spinal pain and instability.