Análise eletromiográfica e de força de mordida de pacientes acometidos por desordens temporomandibulares submetidos ao tratamento com placa oclusal / Electromyographic and bite force analysis of patients suffering from temporomandibular disorders undergoing treatment with occlusal splints

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

17/01/2012

RESUMO

The diagnosis of temporomandibular disorders is based on the information collected about symptoms during clinical examination of the occlusion and radiological examinations of the temporomandibular joints. In the search for better understanding of the pathophysiology that affects the muscles of the stomatognathic system, electromyographic analysis has been included in many studies because allows the identification of when and how a muscle is activated and also the determination of how the coordination of muscles is involved in movement. Other studies have also demonstrated the usefulness of measuring bite force of subjects with temporomandibular disorders, as an additional method for understanding the function of the masticatory muscles of the same. The aim of this study was to analyze and compare the activity of pairs of muscles by electromyography during clenching and chewing tests, and analyze the performance of masticatory muscles by measuring the bite force before and after treatment with occlusal splints, and still performing, for both, a reliability analysis of the tests (repeatability). The sample consisted of 15 subjects with temporomandibular disorder and 20 control subjects without signs or symptoms of temporomandibular disorders according to the classification proposed by the protocol of the Research Diagnostic Criteria for Temporomandibular Disorders. The electromyographic examinations and bite force were performed at the Laboratory of Research in Electromyography of the Stomatognathic System. Significant differences were found in the index POCmm among the groups DTMi and DTMf, for the static test; for the index cycle and frequency, both on the left side, among groups DTMi and DTMf for the dynamic test; and among the control and DTMi groups for the bite force test. In addition, we found a statistically significant correlation between the bite force data, POC Médio and tors. In the end, this study provided a better understand of the diagnosis of TMD by instrumental analysis, providing a biological sense to the surface electromyography and to the evaluation of bite force in cases of temporomandibular disorders.

ASSUNTO(S)

bite force and masticatory muscles desordens temporomandibulares electromyography eletromiografia força de mordida e músculos da mastigação temporomandibular disorders

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