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Auxetic Structures for Tissue Engineering Scaffolds and Biomedical Devices.

Yujin Kim1, Kuk Hui Son2, Jin Woo Lee3

  • 1Department of Plastic and Reconstructive Surgery, Gil Medical Center, College of Medicine, Gachon University, 21, Namdong-daero 774 Beon-gil, Incheon 21565, Korea.

Materials (Basel, Switzerland)
|November 27, 2021
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Summary

Auxetic structures, with their unique negative Poisson

Keywords:
auxeticbiomedicaldevicescaffoldtissue engineering

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Biomedical Engineering

Background:

  • Auxetic structures, exhibiting a negative Poisson's ratio, expand transversely when stretched axially.
  • Their application in tissue engineering and biomedical fields remains largely unexplored.
  • Advancements in additive manufacturing enable the creation of complex 3D auxetic structures.

Purpose of the Study:

  • To explore the potential of auxetic structures in tissue engineering and biomedical applications.
  • To investigate the fabrication methods and biomaterials suitable for auxetic scaffolds.
  • To evaluate the performance of auxetic structures in cell culture and tissue regeneration.

Main Methods:

  • Fabrication of auxetic scaffolds using additive manufacturing, soft lithography, and other techniques.
  • Utilizing various biomaterials like poly(ethylene glycol diacrylate), polyurethane, and chitosan.
  • Culturing diverse cell types including fibroblasts, osteoblasts, chondrocytes, and stem cells on auxetic scaffolds.

Main Results:

  • Demonstrated successful fabrication of auxetic structures using multiple methods and biomaterials.
  • Observed positive effects on cell proliferation, migration, alignment, and differentiation.
  • Showcased potential for tissue regeneration and applications in biomedical devices like stents and implants.

Conclusions:

  • Auxetic structures offer tunable mechanical properties mimicking natural tissues, enhancing tissue reconstruction.
  • Further research into auxetic micro/nano-environments could revolutionize tissue engineering.
  • Auxetic structures show promise for advanced biomedical devices and regenerative medicine.