Avaliação da resposta muscular eletromiográfica antes e após o restabelecimento da dimensão vertical em pacientes desdentados totais

• Autor(a) principal: Pereira, Ana Aline Alves [UNESP]
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/156553; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2018-05-10/000899508.pdf
• topic: Prótese total; Eletromiografia; Músculos mastigatórios

The edentulous patients have as a consequence a relative loss of their masticatory capacity. It is well known that the maintenance of the masticatory function is especially important in edentulous patients, mainly due to the limitations found in rehabilitations by total dentures. The decrease of vertical occlusion dimension may compromise aesthetics and cause morphological and functional alterations such as hypoactivity of masticatory muscles and reduction of masticatory strength. Electromyography involves the detection and recording of electrical potentials of muscle fibers, making it possible to evaluate the function of the muscle in activity and integrity of this system. Therefore, this present work has as general objective to make a comparative analysis of the strength and electrical activity of the masticatory muscles; the superficial masseter layer and the anterior temporal of three edentulous patients with reduced vertical dimension, and who were subsequently subjected to prosthetic rehabilitation treatment. For electromyographic recording, the six-channel EMG-800C (EMG System do Brasil Ltda) electromyograph was used, previously calibrated. Four input channels were used with active electrodes with 20 times amplification gain. At the same time, the masticatory strength was evaluated through a force transducer, linked to the system. All participants of this study were evaluated clinically and electromyographically before and after (about 30 to 60 days) the manufacturing of dentures under parameters of mandibular rest and maximum voluntary mandibular contraction. It was observed an increase of the Masseter and Temporal muscles activity (bilateral), in the two conditions of muscular activity, suggesting an increase in motor tone and increment of new motor units, after the installation of the prosthesis, thus improving the pattern of muscle activity followed by restoration of the appropriate ...(Complete abstract eletronic access below)