| Project/Area Number |
18592118
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
補綴理工系歯学
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| Research Institution | Osaka University |
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Principal Investigator |
MIZUMORI Takahiro Osaka University, Dental Hospital, Assistant Professor (10200023)
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| Co-Investigator(Kenkyū-buntansha) |
YATANI Hirofumi Osaka University, School of Dentistry, Professor (80174530)
KINUTA Souichirou Osaka University, Dental Hospital, Lecturer (60397651)
佐藤 順康 大阪大学, 歯学部附属病院, 医員 (40397675)
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| Project Period (FY) |
2006 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥4,020,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥720,000)
Fiscal Year 2007: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2006: ¥900,000 (Direct Cost: ¥900,000)
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| Keywords | bruxism / sleep stage / EMG / portable EMG / bruxism noise / pulse wave / inhibitory stimulation / electric stimulation |
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| Research Abstract |
The purpose of this study is to develop a system that will predict and suppress sleep bruxism by wearable devices. Within this research period, an algorithm for prediction of the onset of bruxism activity and a method of suppression of bruxism without affecting the sleep state were sought. First, the usability and the influence to sleep of an ambulatory type electromyograph and a wrist watch type sleep stage analyzer were investigated. Six subjects who were aware of sleep bruxism, had jaw pain or extensive teeth attrition, and had been confirmed bruxism sound by their family were instructed the use of the devices and recorded EMG and sleep stage for three to five nights at home. They reported occasional detachment of EMG sensors, but no complaint for wearing the devices or for disturbances of sleep were observed.
Another two subjects with sleep bruxism were electrically stimulated (15mA, 5sec, 0.2sec intervals) by a portable stimulator at the onset of bruxism. Reduction of bruxism noise was observed by this electric stimulation. No obvious changes of sleep status were noticed indicating they were not disturbed their sleep by this stimulation. Further investigation of trigger of stimulation, such as a rise in heart rate and muscle tone, and increased number of subjects may lead to an automatic wearable device for sleep bruxism suppression.
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