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3D Printing Model of a Patient's Specific Lumbar Vertebra
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Procedure-Specific Validation of Artificial Vertebrae.

Marianne Hollensteiner, David Furst, Peter Augat

    IEEE Transactions on Bio-Medical Engineering
    |July 11, 2018
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    Summary
    This summary is machine-generated.

    Novel hybrid patient simulators with artificial vertebrae offer realistic haptic feedback for surgical training. Developed materials mimic bone properties for safe practice of vertebroplasty and screw placement.

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    Area of Science:

    • Biomedical Engineering
    • Surgical Simulation
    • Materials Science

    Background:

    • Novice surgeons require safe training environments for complex procedures.
    • Realistic haptic feedback is crucial for mastering instrument insertion and screw placement in spinal surgery.
    • Existing simulators often lack accurate tactile simulation of bone properties.

    Purpose of the Study:

    • To develop and validate novel hybrid patient simulators for surgical training.
    • To create artificial vertebrae that realistically mimic the haptic properties of human bone for transpedicular vertebroplasty and pedicle screw placement.
    • To assess the efficacy of new open-celled material compositions in replicating surgical instrument feel.

    Main Methods:

    • Developed and tested new open-celled material compositions for artificial vertebrae.
    • Measured vertebroplasty tool insertion force and pedicle screw torque.
    • Created a parametric model to validate transpedicular tool insertion using characteristic parameters.
    • Validated materials against human vertebrae data for pedicle screw placement torque.

    Main Results:

    • A parametric model demonstrated suitability with less than 6% relative error.
    • Artificial vertebrae with 1.25% blowing agent closely matched human bone weighting and clamping forces.
    • One material composition with 1% blowing agent achieved comparable insertion torque slopes to human vertebrae.
    • No tested material accurately replicated instrument cutting forces.

    Conclusions:

    • Two validated materials provide realistic haptic feedback for instrument insertion during training.
    • The developed parametric model effectively simulated transpedicular instrument insertion.
    • These simulators offer potential for practicing cement application in surgical skill training.