EMG Activity of Clenching on a Night Appliance, an ORA or in Centric Occlusion

*2335 EMG Activity of Clenching on a Night Appliance, an ORA or in Centric Occlusion*
R. GARCIA¹, P. SHERMAN¹, and J. RADKE², ¹Bay Area Center for CMD, Tampa, FL, USA, ²BioResearch Associates, Inc, Milwaukee, WI, USA Orthopedic Repositioning Appliances [ORA] have been widely recommended for treatment of certain CMD conditions. Objective: To compare the maximum amount of electromyographic activity elicited from the musculature by voluntary clenching on; 1) a specific Night Appliance [NA], 2) an ORA and 3) the natural dentition. Method: included fabrication of an ORA and an NA for 48 patients. Then, EMG activity was recorded from each patient's masseter and temporalis muscles during voluntarily clenching on the ORA, the NA and on natural dentition. Results: Using a paired difference test we found that the level of EMG activity with the NA was significantly lower (p < 0.0005) than for the ORA or the natural dentition. Clenching with the ORA was not significantly different than with the natural dentition, (p > 0.05). Conclusion: The specific Night Appliance significantly reduced the level of voluntary muscle contraction as compared to an Orthopedic Repositioning Appliance or natural dentition.
Seq #211 - TMD - Treatment and Pathophysiology 11:00 AM-12:15 PM, Friday, 8 March 2002 San Diego Convention Center Exhibit Hall C
Back to the Neuroscience / TMJ Program Back to the IADR/AADR/CADR 80th General Session (March 6-9, 2002)
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