Relationship between masseter muscle electromyographic activities and the position of the mandible / 南方医科大学学报
Journal of Southern Medical University
;
(12): 1932-1934, 2011.
Artigo
em Chinês
| WPRIM
| ID: wpr-265748
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the changes in electromyographic activities of the temporal and masseter muscles at different positions of the mandible.</p><p><b>METHODS</b>Twenty orthodontic patients with Angle Class II malocclusion and mandibular retrusion (ANB<6°) aged 10-14 years were enrolled in this study. All the patients were treated with Forsus fixed functional appliance combined with MBT straight-wire appliance. The electromyographic activities of the temporal (T) and masseter (M) muscles before, during and after functional treatment were evaluated by assessing the average integrated electromyogram (EMG) and T/M ratio at clenching status in different mandibular positions.</p><p><b>RESULTS</b>After functional forward positioning of the mandible, the electromyographic activities of the temporal and masseter muscles decreased and T/M ratio increased significance at the clenching status (P<0.05).</p><p><b>CONCLUSION</b>The appliance insertion and activation is associated with a decreased EMG activity of the temporal and masseter muscles, and the T/M ratio is correlated to the position of the mandible.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Aparelhos Ortodônticos
/
Retrognatismo
/
Músculo Temporal
/
Terapêutica
/
Eletromiografia
/
Má Oclusão Classe II de Angle
/
Músculo Masseter
Limite:
Adolescente
/
Criança
/
Feminino
/
Humanos
/
Masculino
Idioma:
Chinês
Revista:
Journal of Southern Medical University
Ano de publicação:
2011
Tipo de documento:
Artigo
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