期刊
JOURNAL OF ORAL REHABILITATION
卷 30, 期 2, 页码 139-145出版社
BLACKWELL PUBLISHING LTD
DOI: 10.1046/j.1365-2842.2003.01017.x
关键词
electromyography; temporalis muscle; masseter muscle; sleep; interocclusal appliance
The purpose of this study was to examine the effect of an interocclusal appliance on nocturnal masticatory muscle activities. Six healthy Japanese males (mean age: 26.8 years) participated in this study. Electromyographic (EMG) activities of the right anterior temporalis and masseter muscles were recorded using a portable EMG recording unit at night both with and without an interocclusal appliance. In both muscles, the maximal EMG activity and the number of bruxing events decreased significantly by wearing the appliance. Moreover, the duration of a higher level of muscle activity was decreased while that of a lower level of muscle activity increased by wearing the appliance in both muscles. These findings suggest that nocturnal masticatory muscle activity is significantly reduced by wearing an interocclusal appliance, and that the use of such an appliance at night could help to relax masticatory muscles.
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