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Muscular and condylar response to rapid maxillary expansion. Part 1: electromyographic study of anterior temporal and superficial masseter muscles
- Source :
- American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics. 133(6)
- Publication Year :
- 2006
-
Abstract
- Introduction: In this prospective clinical study, we investigated the effects of rapid maxillary expansion ( RME) on the electromyographic ( EMG) activities of the anterior temporal and superficial masseter muscles. Methods: The sample included 18 subjects ( 11 girls, 7 boys; mean age, 12.54 years) with unilateral or bilateral posterior crossbites involving 3 or more posterior teeth. There was no control group in this study because of the short observation period. The EMG activity was recorded simultaneously from both muscles during swallowing a sip of water and unilateral gum chewing. Results: The mean EMG ( mEMG) activities of the right and left anterior temporal muscles showed no statistically significant difference during swallowing and unilateral chewing. The mEMG activities of the right and left masseter muscles showed a statistically significant difference at unilateral chewing ( P < 0.01). There were a decrease of the mEMG activities for both muscles after RME and an increase during the observation period for unilateral chewing ( P < 0.05). Swallow-related mEMG activities of both muscles showed increases after RME and during the observation period ( P < 0.05). Conclusions: RME affected the EMG activities of the anterior temporal and superficial masseter muscles during swallowing and unilateral chewing. These findings suggest that the alterations in the EMG activities of these muscles should be considered in both the treatment and the the stability of maxillary transverse deficiencies.
- Subjects :
- Male
Palatal Expansion Technique
Adolescent
Orthodontics
Temporal Muscle
Electromyography
Temporal muscle
Condyle
Masseter muscle
stomatognathic system
Swallowing
medicine
Humans
Prospective Studies
Child
medicine.diagnostic_test
business.industry
Masseter Muscle
digestive, oral, and skin physiology
Mandibular Condyle
Magnetic resonance imaging
Anatomy
Magnetic Resonance Imaging
Temporomandibular joint
medicine.anatomical_structure
Posterior teeth
Mastication
Female
business
Deglutition Disorders
Malocclusion
Subjects
Details
- ISSN :
- 10976752
- Volume :
- 133
- Issue :
- 6
- Database :
- OpenAIRE
- Journal :
- American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics
- Accession number :
- edsair.doi.dedup.....eefde133024e229bebd81491966cdd4a