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Updated: Sep 2, 2025
An Implantable System For Chronic In Vivo Electromyography
Published on: April 21, 2020
Effects of an intraoral device (IOD) on electromyographic activity on the masseter and temporal muscles in Class III
Andrea E Bono1, Jorge Learreta2
1Department of Orthodontics UNLP, Master Orthodontics UBA, National University of La Plata (UNLP), La Plata, Argentina.
Objective:
Class III malocclusion is characterized by a loss of vertical dimension associated with muscle imbalance. The present study was designed to determine electromyographic amplitude changes in temporal (T) and masseter (M) at rest and during clenching in Class III patients treated with an intraoral device (IOD) over a 24-hour period for 30 days with transcutaneous electrical nerve stimulation (TENS).
Methods:
Twelve patients with Class III (mean age 27.7 ± 1.2 years) were treated with TENS and IOD. Ten untreated patients composed the control group. Data were analyzed using Wilcoxon test and ANOVA.
Results:
Patients treated with TENS and IOD showed a marked decrease in hyperactivity of M and T at rest (p = 0.001) and an increase during clenching (p = 0.001). The control group maintained similar activity in both positions.
Conclusion:
This study confirms that using TENS and IOD in patients improves muscle activity of T and M.
