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Comparison of dynamic electromyographic analysis of masticatory capsules with materials of different textures
Mateus Sgobi Cazal1, Ana Maria Bettoni Rodrigues da Silva2, Rodrigo Galo2
1a School of Dentistry of Ribeirão Preto , University of São Paulo , Brazil.
Objectives:
The aim of this study was to compare the mastication electromyographic indexes of capsules used for the masticatory efficiency evaluation "ME-mastig" and of materials of different textures (gum, raisins, and peanuts).
Methods:
Thirty young, healthy, adult subjects, with an average age of 23.46 years old, with no symptoms of temporomandibular dysfunction (TMD), confirmed by the clinical exam, RDC/TMD, and the static test of electromyography (EMG) were chosen. Afterward, dynamic tests were performed (bilateral mastication of the compounds) to determine number of chewing cycles (CYCLES); masticatory frequency (FREQ); SMI (symmetrical masticatory index - corresponding to the value of neuromuscular coordination during mastication); and IMPACT (corresponding to impact - total electromyographic activity performed by the system during chewing).
Results:
Cycle and frequency were similar. Regarding SMI and IMPACT, the raisin, the capsule, and the peanut were similar between each other, and different from the gum.
Conclusions:
Masticatory capsules and the natural foods with different textures had similar results regarding EMG indexes.
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