fa Effect of Contingent Electrical Stimulation on Masticatory Muscle Activity and Pain in Patients with a Myofascial Temporomandibular Disorder and Sleep Bruxism بیماری های دهان Oral Medicine پژوهشي Research <p> <strong>Aims:</strong></p><p>  To determine whether an intervention reduces oromotor activity and masticatory muscle pain in myofascial temporomandibular disorder (M/TMD) patients with high levels of masticatory muscle activity associated with sleep bruxism. </p><p> <strong>Methods:</strong></p><p>  Fourteen women with M/TMD and prior polysomnographic evidence consistent with sleep bruxism participated in a 10-week single-group pre-test/ post-test mechanistic clinical trial. A 2-week period of baseline monitoring of individually biocalibrated electromyographic (EMG) events associated with sleep bruxism was followed by 6 weeks of EMGevent- contingent treatment via an innocuous electrical pulse to the skin overlying the temporalis muscle. Treatment was discontinued during 2-week follow-up monitoring. Each night before sleep, subjects recorded their average daily pain.</p><p> <strong> Results</strong>: </p><p> Mixed-model analysis of variance showed a reliable reduction of EMG events during contingent stimulation treatment periods, but frequency of EMG events returned to baseline levels during follow-up (linear term, P = .002 quadratic term, P = .001). In contrast, nightly pain reports failed to show any systematic changes during treatment (linear and quadratic trends, both P > .10). </p><p> <strong>Conclusion:</strong></p><p>  Spontaneous pain severity and nighttime oromotor activity vary independently over nights, even in M/TMD patients selected for relatively high levels of both characteristics. </p><hr><p></p><p> <strong>Source: </strong>Journal of Orofacial Pain</p><p> <a href="http://jop.quintessenz.de/index.php?doc=toc&year=2013&issue=1" target="_blank"><font color="#0000ff">Full Text</font></a></p> bruxism, electromyography, orofacial pain, temporomandibular disorders 0 0 http://idai.ir/browse.php?a_code=A-10-32-2034&slc_lang=fa&sid=1 Karen G. Raphael 10031947532846009546 10031947532846009546 Yes Malvin N. Janal 10031947532846009547 10031947532846009547 No David A. Sirois 10031947532846009548 10031947532846009548 No Peter Svensson 10031947532846009549 10031947532846009549 No