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Related Experiment Video

Updated: Jun 14, 2025

Three-dimensional Navigation-guided, Prone, Single-position, Lateral Lumbar Interbody Fusion Technique
08:38

Three-dimensional Navigation-guided, Prone, Single-position, Lateral Lumbar Interbody Fusion Technique

Published on: July 15, 2021

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Lumbopelvic Stabilization with Two Methods of Triangular Osteosynthesis: A Biomechanical Study.

Niklas Grüneweller1, Julia Leunig1,2, Ivan Zderic2

  • 1Bielefeld University, Medical School and University Medical Center OWL, Protestant Hospital of the Bethel Foundation, Department of Trauma and Orthopedic Surgery, Burgsteig 13, 33617 Bielefeld, Germany.

Journal of Clinical Medicine
|August 29, 2024
PubMed
Summary

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A novel triangular fixation technique for pelvic fractures showed similar biomechanical stability to the standard method. This new approach, involving a fenestrated iliac screw, offers comparable results in stabilizing unstable pelvic ring fractures.

Area of Science:

  • Orthopedic surgery
  • Biomechanics
  • Trauma management

Background:

  • Pelvic fractures, especially dorsal pelvic ring instabilities, are increasing, particularly in orthogeriatric patients.
  • Spino-pelvic triangular osteosynthesis effectively stabilizes vertically unstable fractures.
  • This study evaluates a novel triangular fixation instrumentation.

Purpose of the Study:

  • To compare the biomechanical performance of a novel triangular osteosynthesis technique with the conventional method.
  • To assess implant stability and failure modes in artificial osteoporotic pelvic models.

Main Methods:

  • Sixteen artificial osteoporotic L5+pelvis models with unstable sacral fractures were used.
  • Two fixation groups: conventional triangular fixation (TF) and novel fenestrated iliac screw technique (TFS).
Keywords:
biomechanicsdorsal pelvic ringlumbopelvic instabilitytriangular fixation

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Last Updated: Jun 14, 2025

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  • Cyclic loading to failure was performed for biomechanical testing.

    • Main Results:

    • Both TF and TFS configurations demonstrated comparable initial stiffness and cycles to failure.
    • The TFS group showed a trend towards higher cycles to failure and lower loosening.
    • These differences were not statistically significant due to the artificial bone model limitations.

    Conclusions:

    • The novel triangular fixation system using a fenestrated iliac screw provides comparable biomechanical stability to standard triangular osteosynthesis.
    • Further research may be needed to confirm the potential advantages of the novel technique in clinical settings.