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Matching Polyjet 3D Printed Material Properties to Human Left Heart Tissue Mechanical Behavior.

Jakari C L Harris1, Adam S Verga1, Scott J Hollister1

  • 1Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA.

Journal of Biomedical Materials Research. Part B, Applied Biomaterials
|December 15, 2025
PubMed
Summary

3D printed heart models using Stratasys J750 DAP materials are stiffer than human cardiac tissue. Researchers identified the best tissue-mimicking materials for cardiovascular applications by comparing mechanical properties.

Keywords:
3D printercardiachumanmatchingmaterialsmechanical behaviorpolyjet

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Cardiovascular Research

Background:

  • 3D printing offers patient-specific anatomical models for cardiovascular procedure planning.
  • Current 3D printed models lack detailed mechanical property characterization compared to actual human tissues.
  • Tissue-mimicking materials for 3D printing require thorough comparison with native tissue biomechanics.

Purpose of the Study:

  • To compare the mechanical properties of 3D printed materials from the Stratasys J750 Digital Anatomy Printer (DAP) with human left heart tissue.
  • To create a database of 3D printer materials and identify optimal fits for specific cardiac regions.
  • To evaluate the suitability of polyjet materials for replicating cardiovascular tissue biomechanics.

Main Methods:

  • Mechanical testing of 73 polyjet materials from the Stratasys J750 DAP.
  • Utilized nonlinear elastic constitutive models for material property analysis.
  • Compared experimental data against published human cardiovascular tissue properties.

Main Results:

  • All tested J750 DAP materials demonstrated stiffer mechanical behavior compared to native cardiac tissue across all regions.
  • A database was successfully created, mapping printer materials to cardiac regions.
  • SoftDM400, SolidInternalOrgans_FiberContraction6, and Liver_HighlyContractile were identified as the top three best-fitting materials for specific cardiac regions.

Conclusions:

  • Current 3D printing materials, including those from the J750 DAP, do not fully replicate the mechanical properties of human heart tissue.
  • Further development of tissue-mimicking materials is necessary for accurate cardiovascular modeling.
  • The established database provides valuable insights for selecting the closest-matching materials for cardiovascular 3D printing applications.