Artículos de revistas
Electromyographic evaluation in children having rapid maxillary expansion
Fecha
2009Registro en:
AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS, v.136, n.3, p.355-360, 2009
0889-5406
10.1016/j.ajodo.2007.08.027
Autor
ROSSI, Moara De
ROSSI, Andiara De
HALLAK, Jaime Eduardo Cecilio
VITTI, Mathias
REGALO, Simone Cecilio Hallak
Institución
Resumen
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. (Am J Orthod Dentofacial Orthop 2009;136:355-60)