Surface Electromyographic Changes in Response to Oral Orthotic Device Therapy in Subjects with Masseter and Temporalis Muscle Pain.
Aroni, Donavon Khosrow.
Abstract: Objectives. The purpose of this study was to assess the association between the change in muscle electrical activity of the masseter and temporalis muscles at mandibular rest position and the change in the pain level, from pre-treatment to post-treatment with oral orthotic devices in patients with temporomandibular disorders (TMD) of myogenous origin. Methods. In this prospective clinica... read morel trial, 26 subjects (mean age 36.5 and SD 16.69) seeking TMD treatment were selected to participate in this study. Subjects were diagnosed with asymmetrical bilateral TMD of myogenous origin following Diagnostic Criteria (DC/TMD) Axis I. Subjects were treated for 30 days with custom fabricated upper and lower, hard oral orthotic devices modified by creating uniform occlusal contacts. The custom fabricated upper device was designed with minimized posterior occlusal contacts to be used during sleep. The lower custom fabricated device also was designed with balanced posterior occlusal contacts to be used during the day (approximately 2-3 hours in the morning and 3-4 hours in the afternoon). Surface electromyography (sEMG) of bilateral masseter and anterior temporalis muscles was performed before treatment and four weeks after oral orthotic device therapy. The association between the change in muscle electrical activity of the masseter and temporalis muscles at mandibular rest position and the change in the pain level, from pre-treatment to post-treatment, was assessed. The collected data were statistically analyzed using a mixed model to determine the association between changes in pain and changes in muscle activity. Results. There was no significant association between changes in pain and sEMG pre and post treatment. Conclusion. Despite a noticeable decrease in pain, sEMG findings of this study were not supportive of significant differences in sEMG activity of masseter and temporalis muscles of patients with asymmetrical bilateral myofascial pain.
Thesis (M.S.)--Tufts University, 2014.
Submitted to the School of Dental Medicine.
Advisor: Noshir Mehta.
Committee: George Maloney, Egilius Spierings, Leopoldo Correa, and Tofool Alghanem.
Keywords: Dentistry, and Medicine.read less