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Related Experiment Video

Updated: Aug 1, 2025

In Vivo Evaluation of the Mechanical and Viscoelastic Properties of the Rat Tongue
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Tongue base augmentation to improve swallow function in a cadaveric model.

Apoorva T Ramaswamy1,2, Daniel Cates1, Lisa Evangelista1

  • 1Department of Otolaryngology, Center for Voice and Swallow UC Davis Sacramento California USA.

Laryngoscope Investigative Otolaryngology
|April 24, 2023
PubMed
Summary

Calcium Hydroxylapatite (CaHA) tongue base augmentation shows promise for swallowing impairment. This study in a human cadaver demonstrated feasibility and improved anatomical measurements, suggesting potential as an adjuvant therapy.

Keywords:
aspiration pneumoniadysphagialingual atrophyradiation toxicityswallow impairment

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Area of Science:

  • Otolaryngology and Speech Pathology
  • Biomaterials and Medical Devices

Background:

  • Swallowing impairment due to tongue base atrophy affects quality of life.
  • Current management options for tongue base atrophy are limited.

Purpose of the Study:

  • To evaluate the feasibility of Calcium Hydroxylapatite (CaHA) injection for tongue base augmentation.
  • To assess the impact of CaHA augmentation on pharyngeal area and tongue base proximity to the pharyngeal wall.

Main Methods:

  • A fresh human cadaver was used for the procedure.
  • Calcium Hydroxylapatite (CaHA) was injected into the tongue base under flexible endoscopic guidance.
  • Fluoroscopic images were obtained pre- and post-injection to measure anatomical changes.

Main Results:

  • CaHA injection was easily performed without extrusion.
  • Pharyngeal area decreased from 24.36 to 23.14 cm² post-augmentation.
  • Tongue base to pharyngeal wall distance decreased from 2.21 to 1.32 cm post-augmentation.

Conclusions:

  • Tongue base augmentation with CaHA appears feasible for managing swallowing impairment.
  • CaHA may serve as an adjuvant therapy for tongue base atrophy.
  • Further research is needed to confirm clinical safety and efficacy.