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Considering the importance of the influence of the muscles in the functionality of the stomatognathic system, we sought to carry out this work evaluation of the behavior and performance of the masticatory muscles in diabetic subjects, type 2. This study aimed to compare the electromyographic activity, the thickness of masseter and temporalis muscles and bite force among individuals with diabetes (GD) and healthy control group (GC). The electromyographic activity was assessed using electromyography Myosystem BR-1 in postural conditions of the jaw and non-habitual chewing Parafilm M and habitual chewing of raisins and peanuts. For the analysis of muscle thickness were acquired images of the masseter and temporal muscles at rest and at maximum voluntary contraction using the SonoSite Titan ultrasound machine. The maximum bite force, right and left molar, was obtained through digital dynamometer Kratos. The data collected were subjected to statistical analysis using comparison tests (Student's t test), considering a confidence interval of 95% (SPSS 20.0). The results obtained in this study revealed that individuals with diabetes showed the statistically significant difference electromyographic activity only on condition chewing Parafilm M for left and right in temporal muscles (p <0.05). On ultrasound examination, there was greater muscle thickness for the masseter and temporal thickness less for the diabetic group compared to controls, statistically significant difference. With respect to bite force, it was observed that in diabetic patients, the bite force was lower without statistical significance. It was concluded that the masseter and temporal muscles of diabetics, type 2, suffered electromyographic changes and their thicknesses, which requires the dentist to provide dental treatments that more effectively rehabilitate their diabetic patients.

Efeito do diabetes mellitus, tipo 2, na musculatura do sistema estomatognático - avaliação eletromiográfica, espessura muscular e força de mordida