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Clinically relevant mechanical testing of hernia graft constructs.

Sambit Sahoo1, Katherine R DeLozier2, Ahmet Erdemir1

  • 1Department of Biomedical Engineering, Cleveland Clinic, Cleveland, OH 44195, USA.

Journal of the Mechanical Behavior of Biomedical Materials
|December 3, 2014
PubMed
Summary

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Mechanical testing of hernia repair grafts is crucial. Planar-biaxial testing of sutured constructs provides the most clinically relevant assessment of graft mechanical properties for hernia repair.

Area of Science:

  • Biomaterials Science
  • Surgical Engineering
  • Mechanical Engineering

Background:

  • Hernia repair requires understanding graft mechanical behavior.
  • Clinically relevant testing methods for hernia grafts are needed.

Purpose of the Study:

  • To compare mechanical properties of commercial hernia grafts.
  • To evaluate different mechanical testing and analysis methods for clinical relevance.

Main Methods:

  • Tested DermaMatrix, Biodesign, and VitaMesh grafts using ball-burst and planar-biaxial methods.
  • Performed load-to-failure and cyclic fatigue tests on sutured constructs.
  • Analyzed dilatational strain considering construct or graft as the area of interest.

Main Results:

Keywords:
Ball burst testsBiomechanical propertiesConstruct testingHernia meshPlanar biaxial testsVentral hernia repair

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  • Grafts exhibited distinct mechanical properties in load-to-failure and cyclic tests.
  • Planar-biaxial testing generally showed stiffer constructs than ball-burst testing.
  • Strain analysis method impacted results, with construct analysis yielding more compliant properties.

Conclusions:

  • Graft fixation, test mode, and analysis method significantly influence mechanical characterization.
  • Planar-biaxial tests offer comprehensive property assessment (construct, graft, material) and anisotropy.
  • Testing sutured constructs with construct strain analysis is most clinically relevant for hernia repair graft assessment.