Avaliação biomecânica da atividade dos músculos masseter e temporal usando novo dispositivo intrabucal em pacientes com síndrome de down
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Data
2018-08-22
Autores
Tenguan, Vera Lúcia Sizue [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
Esta pesquisa avaliou por meio de análise eletromiográfica de superfície (EMGs)os efeitos terapêuticos de um dispositivo intrabucalsobre as atividades elétricas dos músculos masseter (porção superficial) e temporal (porção anterior), bilateralmente, em pacientes com síndrome de Down. A amplitude de abertura bucal, a intensidade de força mastigatória total (FMT) foram, também, investigadas por meio de paquímetro e transdutor de força. Adicionalmente, medidas antropométricas, incluindo índice de massa corporal (IMC), circunferências do pescoço (P) e abdominal (A) e relação cintura e quadril (RCQ) foram analisadas antes e após dois meses de terapia com DM. Dez pacientes com síndrome de Down, adultos, de ambos os gêneros, foram submetidos a uma terapia com um dispositivo mastigatório (DM). Os registros eletromiográficos foram realizados para avaliar a atividade elétrica dos músculos masseter e temporal, antes e após a terapia preconizada.Diante dos resultados obtidos, conclui-se que o DM promoveu diminuição das atividades elétricas do músculo temporal em condição de repouso da mandíbula e aumento da abertura bucal, conferindo um possível equilíbrio no sistema muscular mastigatório. A atividade elétrica na contração isométrica do músculo masseter e temporal foi aumentada, sugerindo uma maximização nas unidades motoras. A discreta redução do IMC e da RCQ indica, provavelmente, uma melhoria na distribuição de gordura corporal dos pacientes.Portanto, o DM colaborou para a melhoria do desempenho biomecânico da mastigação.
This research evaluated the therapeutic effects of an intrabuccal device on the electrical activities of the masseter (superficial portion) and temporal (anterior portion) muscles, bilaterally, in patients with Down syndrome by means of surface electromyographic analysis (EMGs). The mouth opening amplitude and the total masticatory force intensity (FMT) were also investigated by means of a pachymeter and force transducer. In addition, anthropometric measurements, including body mass index (BMI), neck (P) and abdominal (A) circumference and waist and hip ratio (WHR) were analyzed before and after two months of DM therapy. Ten patients with Down syndrome, adults of both genders, underwent masticatory (DM) therapy. The electromyographic records were performed to evaluate the electrical activity of the masseter and temporal muscles, before and after the recommended therapy. In view of the obtained results, it was concluded that DM promoted a decrease in the electrical activities of the temporal muscle in a condition of rest of the mandible and increase of the buccal opening, conferring a possible balance in the muscular masticatory system. The electrical activity in the isometric contraction of the masseter and temporal muscle was increased, suggesting a maximization in the motor units. The discrete reduction in BMI and WHR probably indicates an improvement in patients' body fat distribution. Therefore, DM collaborated to improve the biomechanical performance of mastication.
This research evaluated the therapeutic effects of an intrabuccal device on the electrical activities of the masseter (superficial portion) and temporal (anterior portion) muscles, bilaterally, in patients with Down syndrome by means of surface electromyographic analysis (EMGs). The mouth opening amplitude and the total masticatory force intensity (FMT) were also investigated by means of a pachymeter and force transducer. In addition, anthropometric measurements, including body mass index (BMI), neck (P) and abdominal (A) circumference and waist and hip ratio (WHR) were analyzed before and after two months of DM therapy. Ten patients with Down syndrome, adults of both genders, underwent masticatory (DM) therapy. The electromyographic records were performed to evaluate the electrical activity of the masseter and temporal muscles, before and after the recommended therapy. In view of the obtained results, it was concluded that DM promoted a decrease in the electrical activities of the temporal muscle in a condition of rest of the mandible and increase of the buccal opening, conferring a possible balance in the muscular masticatory system. The electrical activity in the isometric contraction of the masseter and temporal muscle was increased, suggesting a maximization in the motor units. The discrete reduction in BMI and WHR probably indicates an improvement in patients' body fat distribution. Therefore, DM collaborated to improve the biomechanical performance of mastication.
Descrição
Palavras-chave
Síndrome de Down, Dispositivo mastigatório, Hipotonia muscular, Eletromiografia, Antropometria, Down syndrome, Masticatory device, Muscle hypotonia, Electromyography, Anthropometry