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Dentofacial morphology and tongue function during swallowing.

Chia-Fen Cheng1, Chien-Lun Peng, Hung-Yi Chiou

  • 1Department of Orthodontics, Graduate Institute of Oral Rehabilitation, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan.

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
|November 20, 2002
PubMed
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Tongue movements during swallowing influence dentofacial morphology, particularly vertical dimension and arch length. Ultrasonography effectively measures these tongue dynamics for orthodontic research.

Area of Science:

  • Dentofacial Orthopedics
  • Biomechanics
  • Physiology

Background:

  • The tongue's role in occlusion development is crucial but not fully understood.
  • Understanding tongue movement patterns during swallowing is key to assessing their impact on craniofacial growth.

Purpose of the Study:

  • To investigate the correlation between tongue movements during swallowing and dentofacial morphology.
  • To evaluate ultrasonography as a tool for measuring tongue dynamics in relation to dental casts and cephalometric radiography.

Main Methods:

  • Utilized ultrasonography (B+M mode with cushion-scanning), cephalometric radiography, and dental casts.
  • Measured duration, magnitude, and speed of tongue movements in 112 healthy adults.
  • Performed simple correlation analysis between tongue movement parameters and dentofacial variables.

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Main Results:

  • Tongue movement magnitude in phase IIIa significantly correlated with dentofacial morphology.
  • A positive correlation was observed between intermaxillary vertical dimension and tongue motion magnitude.
  • Prolonged swallowing duration was associated with increased arch length.

Conclusions:

  • Tongue movements during swallowing are demonstrably linked to dentofacial morphology.
  • Ultrasonography provides a valuable method for studying the relationship between tongue function and craniofacial development.
  • Specific tongue movement characteristics, like motion magnitude, are more predictive of morphological traits than duration or speed.