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Related Experiment Videos

Particulate silicone for vocal fold augmentation: morphometric evaluation in a rabbit model.

Manuel Bernal-Sprekelsen1, Miguel Caballero, Xavier Farrè

  • 1Department of Otorhinolaryngology, Hospital Clínic, Barcelona, University of Barcelona, Barcelona, Spain.

The Annals of Otology, Rhinology, and Laryngology
|April 1, 2004
PubMed
Summary

Polydimethylsiloxane (PDMS) injections resulted in greater vocal fold medialization compared to polytetrafluoroethylene (PTFE) in a rabbit model. PDMS provided more stable and thicker vocal fold augmentation with a foreign body giant cell reaction.

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Area of Science:

  • Otolaryngology
  • Biomaterials Science
  • Regenerative Medicine

Background:

  • Vocal fold paralysis leads to impaired voice and airway protection.
  • Surgical augmentation aims to restore vocal fold function.
  • Particulate plastics are explored as injectable biomaterials for vocal fold augmentation.

Purpose of the Study:

  • To compare the efficacy and histological response of polydimethylsiloxane (PDMS) and polytetrafluoroethylene (PTFE) injections for vocal fold augmentation in a rabbit model.
  • To evaluate the long-term stability and tissue integration of these injectable materials.

Main Methods:

  • A prospective, experimental study involving 45 rabbits with surgically induced vocal fold paralysis.
  • Comparison of three groups: control (nerve section), PTFE injection, and PDMS injection.

Related Experiment Videos

  • Histomorphological analysis at 6 weeks and 6 months post-injection using a digital measuring system.

    • Main Results:

    • Both PDMS and PTFE elicited a foreign body giant cell reaction with fibrous stroma, with no implant displacement or extrusion observed.
    • Vocal fold length was similar between PDMS and PTFE groups.
    • PDMS injection resulted in a thicker vocal fold, particularly in the anterior and middle thirds at 6 weeks, and demonstrated greater and more stable medialization compared to PTFE.

    Conclusions:

    • PDMS is a viable injectable biomaterial for vocal fold augmentation, offering superior medialization and stability compared to PTFE in a rabbit model.
    • Both materials show good biocompatibility without migration or malignant changes.
    • Further research is warranted to explore PDMS for clinical application in vocal fold paralysis treatment.