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| Research article summary (published 30 Aug 2009): |
Electromyographic evaluation in children having rapid maxillary expansion.
Full Abstract
INTRODUCTION: The aim of this study was to analyze the electromyographic activity of the masseter and temporalis muscles of children having rapid maxillary expansion (RME) with a bonded rapid maxillary expansion appliance. METHODS: The sample consisted of 27 children (mean age, 8.6 years) with posterior crossbite who required RME treatment. Electromyographic activity of the masseter and temporalis muscles was analyzed before treatment and after the appliance was removed. The mean interval between the 2 analyses was 5 months. Muscular activity was electromyographically analyzed in rest position, and with maximum voluntary dental clenching and chewing. Differences in the 2 measurements were evaluated by using paired t tests. RESULTS AND CONCLUSIONS: Electromyographic analysis showed that activity of the masseter and temporalis muscles increased significantly after the expansion appliance was removed during rest, dental clenching, and habitual chewing.
Author information
Author/s: De Rossi, Moara (M); De Rossi, Andiara (A); Hallak, Jaime Eduardo Cecílio (JE); Vitti, Mathias (M); Regalo, Simone Cecílio Hallak (SC);
Affiliation: Postgraduate student, Department of Pediatric Dentistry, Piracicaba School of Dentistry, State University of Campinas, São Paulo, Brazil.
Journal and publication information
Publication Type: Journal Article
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 (Am J Orthod Dentofacial Orthop), published in United States. (Language: eng)
Reference: 2009-Sep; vol 136 (issue 3) : pp 355-60
Dates: Created 2009/09/07; Completed 2009/09/29;
PMID: 19732669, status: MEDLINE (last retrieval date: 9/29/2009, IMS Date: )
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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