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Related Experiment Video

Updated: Oct 25, 2025

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Lumbar Spondylolysis Reconstruction-Stabilization Using a Motion-Preserving Technique.

Khaled Omran1, Ahmed M Othman1

  • 1Department of Orthopedic Surgery and Traumatology, Faculty of Medicine, Minia University, El-Minia, Egypt; Minia University Spine Unit (MUSU), Faculty of Medicine, Minia University, El-Minia, Egypt.

World Neurosurgery
|August 6, 2021
PubMed
Summary

This study shows that bone graft and pedicular screw-rod-laminar hook fixation effectively treats lumbar spondylolysis, improving patient outcomes and achieving solid bone healing. The procedure preserves spinal motion and avoids adjacent segment issues.

Keywords:
Lumbar spondylolysisPars defectPedicular screw–laminar hook–rod construct

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Area of Science:

  • Orthopedic Surgery
  • Spinal Surgery
  • Biomedical Engineering

Background:

  • Lumbar spondylolysis is traditionally managed conservatively, with surgery reserved for refractory cases or multilevel defects.
  • Surgical intervention aims to address symptomatic patients unresponsive to non-operative treatments.

Purpose of the Study:

  • To prospectively evaluate the clinical, functional, and radiologic outcomes of treating lumbar spondylolysis.
  • To assess the efficacy of bone graft and pedicular screw-rod-laminar hook fixation for pars defect reconstruction.

Main Methods:

  • A prospective study involving 20 patients with symptomatic lumbar spondylolysis treated between October 2017 and January 2020.
  • Treatment involved defect reconstruction with autograft bone and pedicular screw-rod-laminar hook construct.
  • Patients were followed up for a mean of 12.5 months, with clinical, functional, and radiologic assessments.

Main Results:

  • Significant improvements in clinical, radiologic, and functional outcomes were observed.
  • 100% bony union (healing) of the pars defect was achieved in all patients.
  • Increased operative time and hospital stay were noted in multilevel defects and associated injuries; two complications occurred.

Conclusions:

  • Reconstruction fixation using bone graft and pedicular screw-rod-laminar hook construct is an effective and feasible treatment for lumbar spondylolysis.
  • This surgical approach preserves lumbar motion and prevents adjacent-segment degeneration post-fusion.