Comparison of dynamic electromyographic analysis of masticatory capsules with materials of different textures.
OBJECTIVE
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.
a School of Dentistry of Ribeirão Preto , University of São Paulo , Brazil.
Mateus Sgobi
MS
Cazal
b Faculty of Dentistry of Ribeirão Preto , University of São Paulo , Brazil.
Ana Maria Bettoni Rodrigues
AM
da Silva
b Faculty of Dentistry of Ribeirão Preto , University of São Paulo , Brazil.
Rodrigo
R
Galo
c Department of Stomatology, Public Health and Forensic Dentistry, Faculty of Dentistry of Ribeirão Preto , University of São Paulo , Brazil.
Wilson Mestriner
WM
Junior
d Research Laboratory of Electromyography, Stomatognathic System, Faculty of Dentistry of Ribeirão Preto , University of São Paulo , Brazil.
Marco Antonio Moreira Rodrigues
MA
da Silva
D000293:Adolescent; D000328:Adult; D010367:Arachis; D002214:Capsules; D002638:Chewing Gum; D004576:Electromyography / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008409:Mastication / Q000502:physiology*; D027843:Vitis; D055815:Young Adult
D002214:Capsules; D002638:Chewing Gum
Electromyographic; Masticatory efficiency; Masticatory muscles; Normal group