Electromiograph Parameters in Thedysfunctional Patient with Open Bite

INTRODUCTION: Open bite is an occlusal problem that appears in 0.5% of the population, and is more frequent in women. There is correlation between open bite and dysfunctional syndrome with TMJ disorders. AIM OF THE STUDY: We attempted to analyze muscular parameters in patients with open bite treated with an occlusal splint by EMG recordings. MATERIAL AND METHODS: Myotronics K6 electromiograph can provide information in the following situations: maximum force bite, lateral and protrusion movements, with and without an occlusal splint. RESULTS: In maximum force bite with the occlusal splint more activity was found in the elevator muscles with a lack of dygastric activity. There was less EMG activity in protrusive and lateral movements with occlusal splint. CONCLUSION: With better support between the dental arches (occlusal splint) more activity was obtained in the elevators when biting, and when interferences were eliminated activity in the contralateral muscles was reduced.