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Related Experiment Videos

Improved external skeletal fixation for unstable fractures.

R Hammer, P Helland

    Clinical Orthopaedics and Related Research
    |April 1, 1987
    PubMed
    Summary

    A new external fixation device (EX-FI-RE) offers controlled fracture manipulation and stability. Clinical use shows it promotes healing with no infections or failures in over 70 cases.

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    Area of Science:

    • Orthopedic surgery
    • Biomedical engineering
    • Traumatology

    Background:

    • External fixation devices are crucial for fracture management.
    • Existing devices may have limitations in control and stability.
    • A need exists for advanced devices enabling precise fracture reduction.

    Purpose of the Study:

    • To describe a novel unilateral, telescopic, single-frame external fixation device (EX-FI-RE).
    • To analyze the mechanical behavior of EX-FI-RE and compare it to a quadrilateral system.
    • To evaluate the clinical efficacy and safety of EX-FI-RE in fracture treatment.

    Main Methods:

    • Mechanical testing of EX-FI-RE and a Hoffman-Vidal Adrey quadrilateral system under axial loading, anteroposterior loading, and lateral bending.
    • Analysis of turning moments for angular deformation.
    • Clinical evaluation of over 70 cases treated with EX-FI-RE.

    Main Results:

    • EX-FI-RE demonstrated significantly higher stiffness in the anteroposterior plane compared to the quadrilateral system.
    • Both systems showed similar performance in axial loading and lateral bending.
    • The EX-FI-RE device required a higher turning moment for angular deformation, indicating greater stability.

    Conclusions:

    • The EX-FI-RE device provides controlled manipulation and stability for fracture fragments.
    • Clinical experience supports its efficacy in promoting fracture union through closed reduction, compression, and early weight-bearing.
    • The device proved safe and reliable, with no pin tract infections or mechanical failures observed.

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