Bruxism and Masseter and Temporal Muscle Activity Before and After Selective Grinding

Abstract

Odontostomat., 11(3):253-259, 2017. ABSTRACT:This research aimed at determining sleep bruxism events recorded by polysomnography and masseter and temporalis muscle activity recorded by surface electromyography before and after performing a selective grinding. This study comprised three stages: 1. Pre-test (A Clinical Evaluation, an assessment through semi-adjustable articulator, a polysomnography and an electromyography); 2. Selective grinding; 3. Post-test (polysomnography and an Electromyography). A convenience sample of 10 subjects, with premature contact points, was assessed in a dental clinic. Subjects between 21 and 23 years were assessed. All of them had premature contacts. Eight subjects presented subsequent interferences during lateral movements. Data did not meet the criteria of normality or homoscedasticity thus non-parametric Wilcoxon test was used to compare the means of variables before and after. An average of bruxism episodes increased in stages 1 and REM but there was not a significant statistical difference in the polisomnographic recording after selective grinding. In stages 2 and 3 of sleep 26 % and 54 % reductions were found respectively. In stage 3 the difference between events was statistically significant. The recording of electromyographic activity before and after selective grinding showed a decrease in amplitude, length and area of the masseter and temporalis muscles. The difference was statistically significant only for temporary muscles in the length values and the right temporal area. After selective grinding the number of bruxism episodes decreased during the sleep stages 2 and 3. The selective grinding showed a statistically significant reduction of action potentials recorded by the surface electromyography of temporal muscle.

Natural teeth and implant-retained prosthesis in treated periodontitis subjects

“…A night guard of acrylic for the maxillary ridge was given for the initial 3 months and was advised to be used during sleeping. [ 10 ] The recall period was set initially for 3 and then 6 months for the next 2 years. The visits gave us the estimation of marginal bone loss and pocket depth through orthopantomogram [Figures 23 and 24 ].…”

El Valor De Un Ajuste Oclusal, ¿por Qué, Cómo, Cuándo?: Reporte De Caso

“…Sin embargo, muchos estudios realizados por diversos autores, como Klineberg y Au 2 , y Solow 3 , afirman que el procedimiento de ajuste oclusal (AO) modifica ciertas áreas de uno o más dientes para lograr una mejor estabilidad y distribuir de manera adecuada las cargas durante los movimientos excursivos. Por ese motivo, la mayoría de clínicos optan por realizar dicho tratamiento, debido a sus grandes ventajas, que son la reducción de la actividad muscular 4 , la reducción de las fuerzas a nivel de la ATM y la mejora la condición gingival y periodontal de los pacientes 5 .…”