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Updated: Jun 12, 2026
10:13
Hemi-laryngeal Setup for Studying Vocal Fold Vibration in Three Dimensions
Published on: November 25, 2017
Three-dimensional arytenoid movement induced by vocal fold injections
1Clinical Center for Voice Care, Department of Otolaryngology-Head and Neck Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, USA. ted.mau@utsouthwestern.edu
The Laryngoscope
|June 22, 2010
Summary
Vocal fold injection augmentation causes passive arytenoid movement, not natural vocal fold adduction. This finding is crucial for treating vocal fold paralysis without surgical repositioning.
Area of Science:
- Laryngology
- Vocal fold physiology
- Biomechanical analysis
Background:
- Vocal fold injection augmentation is used to treat voice disorders.
- Understanding arytenoid movement post-injection is critical for voice restoration.
Purpose of the Study:
- To quantitatively analyze arytenoid cartilage movement after vocal fold injection augmentation.
- To compare post-injection arytenoid movement to physiologic adduction.
Main Methods:
- Human cadaveric larynges underwent vocal fold injection with calcium hydroxylapatite.
- High-resolution computed tomography (CT) scans were acquired pre- and post-injection.
- 3D reconstructions were generated using MATLAB to compare arytenoid positions.
Main Results:
- Vocal fold injections induced minor medial rotation and translation of the arytenoid cartilage.
- Observed movements did not replicate the typical motion of physiologic vocal fold adduction.
Conclusions:
- Vocal fold injection augmentation results in previously undescribed passive arytenoid movement.
- This passive movement differs from natural adduction, impacting treatment strategies.
- Findings suggest implications for treating unilateral vocal fold paralysis without arytenoid repositioning.
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