Mastigação e atividade eletromiográfica em crianças com mordida cruzada posterior
Mastication and electromyographic activity in children with posterior crossbite
Luciana Vitaliano Voi Trawitzki; Cláudia Maria de Felício; Regina Maria Puppin-Rontani; Mirian Aiko Nakane Matsumoto; Mathias Vitti
Resumo
Objetivo: investigar a preferência mastigatória e o comportamento dos músculos mastigatórios, em crianças de 6 a 9 anos, com mordida cruzada posterior.
Métodos: 30 crianças foram selecionadas num serviço de Ortodontia de uma universidade pública. Após a concordância na participação no trabalho, foi realizada entrevista com a criança e seu responsável, para investigação de disfunção temporomandibular; análise da preferência mastigatória, por meio de registros em vídeo e avaliação eletromiográfica (EMG) dos músculos masseter e temporal anterior, durante a mastigação solicitada, direita e esquerda, de uma goma de marcar.
Resultados: houve diferença significante na atividade EMG dos músculos masseter e temporal anterior entre os lados de trabalho e balanceio, porém não houve diferença estatística quando foram comparadas as atividades EMG entre os lados de mordida cruzada e não cruzada, tampouco entre os lados de preferência e não preferência mastigatória.
Conclusão: na amostra estudada não se verificou assimetria funcional muscular estabelecida.
Palavras-chave
Abstract
Purpose: to investigate the masticatory preference and the behavior of masticatory muscles, in children between6 to 9-year old, with posterior crossbite.
Methods: 30 children were selected from the Orthodontic service of a public university. After consenting to take part in the study, there was an interview with the children and the parent, in order to investigate temporomandibular disorders; masticatory was analyzed through video recording and electromyographic (EMG) evaluation of the masseter and anterior temporal, during the solicited mastication, on right and left, using chewing gum.
Results: there was a significant difference in the EMG activity of the masseter and temporal between work and balance sides, however there was no statistical differences in the comparison between crossbite side and no crossbite side, but neither between preference side and non the preference side.
Conclusion: in the studied population there was no functional muscular asymmetry established.
Keywords
Referências
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Submetido em:
05/02/2009
Aceito em:
18/09/2009
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