Electromyographic analysis of the masticatory muscles in patients with temporomandibular disorder during chewing / Analise da atividade eletromiografica de musculos mastigatorios em portadores de disfunção temporomandibular durante a mastigação

AUTOR(ES)

Cyntia Bicalho Borini

DATA DE PUBLICAÇÃO

2005

RESUMO

Temporomandibular disorders (TMD) are characterized by changes in masticatory musculature, temporomandibular joints and associated structures. The aim of this study was to evaluate masticatory function in TMD patients by means of surface electromyographic (EMG) exam, relating the TMD signs and symptoms to the lateral preference masticatory. Subjects were selected through an anamnesis, Questionnaire for Index and Diagnostic fulfillment and c1inical exam recommended by Research Diagnostic Criteria for Temporomandibular disorders (RDC/TMD). Twenty seven female volunteers were selected, with 20-40 years old (25.03::1:5,22), divided in two groups, one constituted by TMD subjects (16 subjects) and another constituted by c1inically healthy subjects (11 subjects). The EMG exam was carried out in the anterior portion of temporal and superficial part of masseter musc1es bilaterally. The EMG recordings were acquired with single differential Ag/Ag electrodes (gain = 20) in the Myosystem I® equipment, with a sampling rate of 2000 Hz, a 12 bits A/D card, gain of 150, 20 Hz high-pass and 500 Hz low-pass filters. The EMG signal was obtained in three different days, at the same time and with an interval of one week. The evaluation was accomplished during bilateral contraction and habitual mastication. The results showed that there was a relation between the side with the highest leveI of myoelectric activity and lateral preference masticatory in the clinically healthy group, but in the group of the TMD patients this relation was not observed, as in the habitual mastication as in the bilateral contraction. In TMD patients, the anterior portion of temporal showed the highest level of myoelectric activity in the lateral preference masticatory when compared with the superficial part of masseter musc1es

ASSUNTO(S)

electromyography mastication mastigação temporomandibular joint articulação temporomandibular eletromiografia

Documentos Relacionados

• Disfunção temporomandibular, força de mordida e atividade eletromiográfica dos músculos mastigatórios em indivíduos com deformidade dentofacial
• Estudo da dor facial e da atividade eletromiográfica de músculos mastigatórios em portadores de fibromialgia e distúrbios do sono, com diagnóstico de disfunção temporomandibular
• Analise eletromiografica dos musculos masseter e temporal durante atividade mastigatoria em portadores de disfunção temporomandibular
• Analise eletromiografica de musculos mastigatorios : variabilidade e influencia da ansiedade
• Avaliação da atividade eletromiográfica dos músculos mastigatórios nos diferentes tipos faciais.