Analise eletromiografica da fadiga nos musculos temporal anterior e masseter de pacientes com habito de bruxismo submetidos a terapia com placas estabilizadoras do tipo Michigan

AUTOR(ES)
DATA DE PUBLICAÇÃO

2002

RESUMO

The aim of this study was to evaluate, by surface electromyography, the fatigue of anterior part of temporal is and masseter muscles bilaterally in bruxers, before and during the use of Michigan occlusal splints. Two groups were evaluated: group 1 (patients with bruxism) with 16 patients, being 6 men and 10 women with a mean age of 35.68 years (SD = 10.20) and group 2 (control group) with 16 healthy subjects, being 9 men and 7 women, with a mean age of 29.25 years (SD = 5.27). The subjects from group 1 used Michigan occlusal splints, with were not used by subjects of group 2. However, ali the subjects were submitted to isometric contractions (ISO) with maximum voluntary contraction (MVC) of 5 seconds. After the isometric contractions, a visual analogue scale (V AS) was used to evaluate the pain. The electromyography exam was made in all the subjects by a sign acquisition system, with differential silver active surface electrodes that were kept inside Faraday electrostatic cages, in different periods of time (TO, T1, T2, T3 and T4). The t test was used to analyze the paired data (when comparing frequency and amplitude in the examined muscles and VAS) and the t test for independent samples was used to compare the frequency and amplitude in groups 1 and 2 during ISO movements). The comparison of the results of groups 1 and 2 showed a localized fatigue in masseter and anterior part of temporal is muscles during period of time TO. It was concluded that Michigan occlusal splint was effective in reducing the muscular fatigue phenomenon in bruxers, inducing an increase in the median frequency, decreasing the amplitude of the electromiographic sign and also relieving the pain after isometric contractions

ASSUNTO(S)

eletromiografia placas dentarias

ACESSO AO ARTIGO

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