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Chitin nanofibrils modulate mechanical response in tympanic membrane replacements.

Shivesh Anand1, Bahareh Azimi2, Mónica Lucena1

  • 1Department of Complex Tissue Regeneration, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht 6229 ER, the Netherlands.

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|March 16, 2023
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Summary

This study developed novel tissue-engineered scaffolds using chitin nanofibrils and PEOT/PBT copolymer for tympanic membrane (TM) repair. The enhanced scaffolds show improved mechanical properties and biocompatibility for effective eardrum reconstruction.

Keywords:
ChitinEardrumMechanical reinforcementNanocompositePolysaccharideTissue engineering

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Nanotechnology

Background:

  • Tympanic membrane (TM) perforations lead to conductive hearing loss.
  • Tissue engineering offers a promising solution for TM reconstruction.
  • Chitin nanofibrils (CN) possess beneficial biocompatibility and antimicrobial properties.

Purpose of the Study:

  • To investigate the use of CN as a nanofiller in PEOT/PBT copolymer for TM scaffold fabrication.
  • To evaluate the mechanical, degradation, and biocompatibility properties of the developed nanocomposite scaffolds.

Main Methods:

  • Electrospinning and fused deposition modeling were employed for scaffold manufacturing.
  • Nanocomposite scaffolds incorporated CN into a PEOT/PBT matrix.
  • In vitro biodegradation and cytocompatibility assays were conducted.

Main Results:

  • CN inclusion reduced electrospun fiber diameters by three-fold.
  • Significant improvements in mechanical properties suitable for TM repair were observed.
  • CN accelerated scaffold degradation over one year and demonstrated favorable oto- and cytocompatibility.

Conclusions:

  • CN-reinforced PEOT/PBT nanocomposite scaffolds are suitable for TM reconstruction.
  • The developed scaffolds exhibit promising characteristics for effective eardrum repair.
  • This approach holds potential for clinical applications in treating TM perforations.