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Published on: October 20, 2023
Electromyographic evaluation in children having rapid maxillary expansion
Moara De Rossi1, Andiara De Rossi, Jaime Eduardo Cecílio Hallak
1Postgraduate student, Department of Pediatric Dentistry, Piracicaba School of Dentistry, State University of Campinas, São Paulo, Brazil.
Summary
Rapid maxillary expansion (RME) in children significantly increased masseter and temporalis muscle activity. This muscular enhancement was observed after the bonded RME appliance was removed during rest, clenching, and chewing.
Area of Science:
- Orthodontics
- Pediatric Dentistry
- Biomedical Engineering
Background:
- Posterior crossbite is a common dental issue in children requiring treatment.
- Rapid maxillary expansion (RME) is a common orthodontic intervention for posterior crossbite.
- Understanding the muscular adaptations to RME is crucial for treatment efficacy.
Purpose of the Study:
- To evaluate the electromyographic (EMG) activity of the masseter and temporalis muscles in children undergoing RME.
- To compare muscle activity before and after the removal of a bonded RME appliance.
- To assess the impact of RME on masticatory muscle function.
Main Methods:
- EMG analysis of masseter and temporalis muscles in 27 children (mean age 8.6 years) with posterior crossbite.
- Measurements taken at rest, during maximum voluntary dental clenching, and habitual chewing.
- Comparison of muscle activity before RME treatment and after appliance removal (mean 5-month interval).
Main Results:
- Significant increase in masseter and temporalis muscle activity observed post-RME treatment.
- Enhanced muscle activity noted during rest, maximum clenching, and habitual chewing.
- Paired t-tests confirmed statistically significant differences in muscular activity.
Conclusions:
- Bonded RME appliances lead to significant, lasting increases in masticatory muscle activity in children.
- RME influences the neuromuscular function of the masseter and temporalis muscles.
- These findings suggest RME may contribute to improved masticatory muscle function.
