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Related Experiment Videos

Masseter muscle thickness and maxillary dental arch width.

Stavros Kiliaridis1, Ioanna Georgiakaki, Christos Katsaros

  • 1Department of Orthodontics, University of Geneva, Switzerland.

European Journal of Orthodontics
|July 2, 2003
PubMed
Summary

Masseter muscle thickness correlates with maxillary arch width in females, suggesting masticatory muscle function influences dental arch development. Thicker muscles in females were linked to wider dental arches.

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Area of Science:

  • Orthodontics
  • Biometrics
  • Human Anatomy

Background:

  • The relationship between masticatory muscle development and craniofacial morphology is a key area in orthodontics.
  • Understanding factors influencing maxillary dental arch width is crucial for diagnosing and treating malocclusions.

Purpose of the Study:

  • To investigate the association between ultrasonographically measured masseter muscle thickness and maxillary dental arch width.
  • To explore potential correlations in orthodontic patients aged 7-18 years.

Main Methods:

  • Ultrasonography was used to measure masseter muscle thickness in relaxation and contraction.
  • Maxillary intermolar width was measured using an electronic caliper.
  • A sample of 60 Class I orthodontic patients (37 female, 23 male) was analyzed.

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Main Results:

  • Masseter muscle thickness increased with age and was greater in males.
  • In females, a significant positive correlation was found between masseter thickness (both relaxed and contracted) and maxillary intermolar width.
  • No significant relationship was observed between masseter thickness and maxillary intermolar width in males.

Conclusions:

  • Masseter muscle thickness is associated with maxillary intermolar width in female orthodontic patients.
  • Masticatory muscle functional capacity may be a contributing factor to maxillary dental arch width.
  • Further research is warranted to explore these relationships across different demographics and malocclusion types.