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  1. Home
  2. Three-dimensional Evaluation Of Facial Asymmetry And Its Association To Occlusal And Muscular Imbalance In Young Women.
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  2. Three-dimensional Evaluation Of Facial Asymmetry And Its Association To Occlusal And Muscular Imbalance In Young Women.

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Three-dimensional evaluation of facial asymmetry and its association to occlusal and muscular imbalance in young

Lilian Mendes Andrade1, Anna Luísa Alves Fernandes2, Laís Valencise Magri3

  • 1DDS, PhD, Professor. Department of Basic and Oral Biology, Ribeirão Preto School of Dentistry, University of São Paulo, Brazil.

Journal of Clinical and Experimental Dentistry
|October 14, 2024

View abstract on PubMed

Summary
This summary is machine-generated.

Facial asymmetry in young women is linked to imbalances in chewing muscle activity and occlusal contacts. This study highlights how occlusal imbalance and electromyography can predict facial asymmetry.

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Area of Science:

  • Biomedical Engineering
  • Dental Science
  • Anatomy

Background:

  • Facial rehabilitation and aesthetic procedures face challenges in diagnosing asymmetries and restoring functional balance.
  • Facial asymmetry is a complex condition influenced by various anatomical and functional factors.
  • Understanding the interplay between occlusion, muscle activity, and facial form is crucial for effective treatment.

Purpose of the Study:

  • To investigate the association between occlusal imbalance, masseter and temporalis muscle electromyographic activity, and facial asymmetry in young women.
  • To determine if occlusal and muscular imbalances can predict the presence and degree of facial asymmetry.
  • To provide insights into the etiology of facial asymmetry for improved diagnostic and therapeutic strategies.

Main Methods:

  • A cross-sectional observational study involving 50 young women without temporomandibular dysfunction.
  • Facial asymmetry was evaluated using clinical examination and quantified via stereophotogrammetry (root mean square method).
  • Occlusal contact asymmetry and electromyographic activity of masticatory muscles (masseter, temporalis) were measured and analyzed using statistical methods including linear regression.

Main Results:

  • A significant difference in occlusal contact asymmetry was found between symmetric and asymmetric groups (p<0.01, Cohen's d=0.73).
  • Imbalance in the electromyographic activity of the masseter and temporal muscles significantly predicted facial asymmetry (F=4.00, p<0.02, R²=0.15).
  • These findings indicate a strong correlation between functional imbalances and facial morphology.

Conclusions:

  • Occlusal imbalance is significantly associated with facial asymmetry in young women.
  • Electromyographic activity of the masseter and temporal muscles serves as a predictor for facial asymmetry.
  • The study underscores the importance of considering occlusal and muscular factors in the assessment and management of facial asymmetry.