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Related Experiment Video

Updated: Apr 24, 2026

Synthetic, Multi-Layer, Self-Oscillating Vocal Fold Model Fabrication
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In vivo vocal fold cover layer replacement.

Jennifer Long1, Jonathan Salinas, Sassan Rafizadeh

  • 1Research Service, Department of Veteran's Affairs Medical Center, Los Angeles, California; Department of Head and Neck Surgery, David Geffen School of Medicine at University of California, Los Angeles, California.

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|September 13, 2014
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Summary

A new rabbit model for vocal fold repair shows that reimplanted vocal fold covers survive and maintain vibration. This surgical approach minimizes scarring and preserves tissue mechanics for potential voice restoration therapies.

Keywords:
Phonationelastic modulusindentationrabbitvocal fold wound healing

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Area of Science:

  • Regenerative Medicine
  • Otolaryngology
  • Translational Research

Background:

  • Vocal fold scarring impairs voice function.
  • A reliable animal model is crucial for developing treatments for vocal fold scarring.

Purpose of the Study:

  • To develop and validate a rabbit surgical model for vocal fold cover replacement.
  • To assess graft survival, tissue mechanics, and vibratory function after reimplantation.

Main Methods:

  • Rabbit vocal fold covers were surgically excised and immediately reimplanted orthotopically.
  • Vocal fold vibration was assessed using high-speed videography after 4 weeks.
  • Tissue mechanics (elastic modulus) and histology were analyzed.

Main Results:

  • The surgical model demonstrated feasibility, with 5 of 6 rabbits surviving.
  • Reimplanted vocal fold covers survived, maintained epithelial integrity, and partially preserved elastic fibers.
  • Vocal fold vibration and tissue mechanics were preserved, with limited scarring.

Conclusions:

  • Vocal fold cover implantation in rabbits is a feasible surgical model.
  • Graft survival and attachment to the thyroarytenoid muscle prevent excessive scarring.
  • This model preserves tissue mechanics and mucosal vibration, supporting its use for studying voice restoration.