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Novel bone surrogates for cranial surgery training.

Marianne Hollensteiner1, David Fürst2, Benjamin Esterer2

  • 1Research Group for Surgical Simulation Linz, Upper Austria University of Applied Sciences, School of Applied Health and Social Sciences, Garnisonstr. 21, 4020 Linz, Austria; Institute of Biomechanics, Trauma Clinic (BGU) Murnau and Paracelsus Medical University Salzburg, Prof. Küntscher Straße 8, 82418 Murnau, Germany.

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|April 28, 2017
PubMed
Summary
This summary is machine-generated.

New bone surrogate materials mimic human parietal bone properties for surgical training. Calcium phosphate composites offer realistic haptic feedback, improving safety and effectiveness in graft lift procedures.

Keywords:
Artificial bonesBiomechanicsDrillingMillingSawingSimulator

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Area of Science:

  • Biomaterials Science
  • Surgical Simulation
  • Orthopedic Biomechanics

Background:

  • Parietal graft lifts require precise surgical skill to avoid patient harm.
  • Realistic haptic feedback is crucial for surgeons to discern bone layers and prevent brain penetration.
  • Current training methods often lack adequate anatomical and tactile fidelity.

Purpose of the Study:

  • To develop and evaluate anatomically correct artificial skull caps with realistic haptic feedback for surgical training.
  • To create bone surrogate materials that accurately replicate the mechanical properties of human parietal bone.
  • To validate these surrogates for use in graft lift training procedures.

Main Methods:

  • Polyurethane composites containing calcium carbonate and calcium phosphate were synthesized to mimic cancellous and cortical bone.
  • Mechanical properties were assessed by comparing axial insertion forces of surgical tools (drilling, milling, sawing) into surrogates and human parietal bones.
  • A customized test bench was used for automated surgical tool insertion and force measurement.

Main Results:

  • Calcium phosphate-based bone surrogates demonstrated axial insertion forces comparable to human parietal bone across drilling, milling, and sawing tasks.
  • These surrogates showed statistically insignificant differences (p-values > 0.05) when compared to human bone for all tested surgical actions.
  • Calcium carbonate-based materials showed some deviations, exhibiting higher forces for drilling/milling and lower for sawing compared to human bone.

Conclusions:

  • Calcium phosphate-based polyurethane composites represent a suitable material for creating artificial parietal bone surrogates.
  • These developed bone surrogates effectively mimic the mechanical behavior of human bone during surgical procedures.
  • The findings support the use of these advanced materials for enhanced surgical training and education in simulator environments.