徳島大学 教育・研究者情報データベース(EDB)

1. 大倉 一夫([徳島大学.病院.診療科.歯科.かみあわせ補綴科(第二補綴科)]/[徳島大学.歯学部.歯学科.機能維持系臨床歯学講座.顎機能咬合管理学])

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2. 重本 修伺

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3. 鈴木 善貴([徳島大学.病院.診療科.歯科.かみあわせ補綴科(第二補綴科)])

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4. 野口 直人

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5. (英) Omoto Katsuhiro / (日) 大本 勝弘 / (読) おおもと かつひろ

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6. 安陪 晋([徳島大学.大学院医歯薬学研究部.歯学域.口腔科学部門.臨床歯学系.総合診療歯科学]/[徳島大学.病院.中央診療施設等.総合歯科診療部])

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7. 松香 芳三([徳島大学.大学院医歯薬学研究部.歯学域.口腔科学部門.臨床歯学系.顎機能咬合再建学])

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(英) Mandibular movement during sleep bruxism associated with current tooth attrition

(英) Observation of attrition patterns suggests that mandibular movement in sleep bruxism (SB) may be associated with current tooth attrition. The aim of this study was to confirm this phenomenon by investigating mandibular movement and masseter muscle activity. The subject was a healthy 21-year-old Japanese male. We recorded biological signals including mandibular movement and masseter electromyograms (EMGs) with a polysomnograph. Based on the EMG using Okura's criteria, SB events were classified into clenching, grinding and mixed types according to mandibular movement criteria. The close-open mandibular movement cycles (CO-cycles) during grinding and mixed type events were selected based on mandibular movement trajectories. Fifty-eight CO-cycles were selected in seven grinding and three mixed types. We found that SB mandibular movements associated with current tooth attrition. Excessive lateral movements (ELM) beyond the canine edge-to-edge position were observed in the closing (10.3%) and opening (13.8%) phases of the CO-cycle. Total masseter muscle activity was significantly higher during voluntary grinding (VGR) than during CO-cycle including ELM (working side: P=0.036, balancing side: P=0.025). However, in the middle and late parts of the opening phase, working side masseter muscle activity was significantly higher during CO-cycle including ELM than during VGR (P=0.012). In the early part of the closing phase, balancing side masseter muscle activity was significantly higher during CO-cycle including ELM than during VGR (P=0.017). These findings suggest that excessive forceful grinding during ongoing SB events may have caused canine attrition in this patient.

1. (英) Article.ELocationID: S1883-1958(16)30040-8

2. (英) Article.ELocationID: 10.1016/j.jpor.2016.06.003

3. (英) Article.PublicationTypeList.PublicationType: Journal Article

4. (英) KeywordList.Keyword: Canine attrition

5. (英) KeywordList.Keyword: Mandibular movement

6. (英) KeywordList.Keyword: Masseter muscle activity

7. (英) KeywordList.Keyword: Sleep bruxism

8. (英) KeywordList.Keyword: Tooth grinding