2023 Fiscal Year Final Research Report
Effects of vibratory feedback stimuli through an oral appliance on sleep bruxism
| Project/Area Number |
20K10076
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 57050:Prosthodontics-related
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| Research Institution | Showa University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
菅沼 岳史 昭和大学, 歯学部, 教授 (10196694)
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | Sleep bruxism / Biofeedback / Occlusal splints / masseter EMG activity |
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| Outline of Final Research Achievements |
This study elucidated the effect of vibration feedback stimulation via an oral appliance (OA) on SB. Ten participants diagnosed with SB wore a specially designed OA for 45 nights at home. Vibratory stimulation was withheld during the first 2-week adaptation period, applied during the 4-week stimulation period, and again withheld during the post-stimulation period. SB events (the number and duration of SB episodes/hour of sleep) were calculated based on masseter electromyographic activity recorded with in-home portable polysomnography and compared between the 15th and 45th nights (without stimulation) and the 17th and 43rd nights (with stimulation). SB events significantly decreased after vibratory stimulation, then significantly increased upon cessation of vibratory stimulation after the stimulation period. Vibratory stimulation through an OA may suppress SB-related masticatory muscle activity continuously for 4 weeks and may be an effective alternative for the management of SB.
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| Free Research Field |
補綴
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| Academic Significance and Societal Importance of the Research Achievements |
睡眠時ブラキシズム（SB）によって生じる歯の異常な摩耗，補綴装置やインプラントの破損，歯周病や顎関節症などの問題から患者のQOLに影響を及ぼす場合にはOAによる管理が必要であるといわれている．そこでSB患者を対象に，我々が開発したSB抑制装置を用いて，3週間のOAへの順応期間を経た後に9週間にわたり振動刺激を与え，最後の2週間で振動を停止させた際のSBイベント抑制効果の持続性について評価した結果，振動刺激期間中はSB抑制効果が認めらた．SBの力のコントロールを考えるうえで，このSB抑制装置はオーダーメイド医療の確立に繋がり，国民のQOLを維持・向上に貢献できる．
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