Covariance structure analysis of bruxism during sleep or awakening, psychosocial factor and the TMD

2015 Fiscal Year Final Research Report

• Project/Area Number: 25462999
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Prosthodontics/ Dental materials science and
• Research Institution: Hiroshima University
• Principal Investigator: ABEKURA HITOSHI 広島大学, 大学病院, 講師 (30159454)
• Co-Investigator(Kenkyū-buntansha): TUBOI Masahiro 広島大学, 病院, 歯科診療医 (20614382) ; OOKURA Tomohisa 広島大学, 病院, 歯科診療医 (20711360) ; KUREMOTO Kouichi 広島大学, 医歯薬保健学研究院, 助教 (90319583)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 口腔習癖 / 精神的ストレス / ポータブル筋電計 / ブラキシズム / 顎関節症

Outline of Final Research Achievements

We objectively evaluated jaw muscle activity during sleep by a portable EMG device, emotional stress by a psychological test, TMD symptom at getting up by a questionnaire method, digitized the awareness of the sleep bruxism (SB) and TMD symptoms such as the pain of the jaw and fatigue, jaw movement disorder and trismus, the sounds of temporomandibular joint. By analyzing these parameters, we performed the path analysis applied regression analysis. As a result, the emotional stress increased the night jaw muscle activity including the SB, and the increased jaw muscle activity caused not only the TMD symptom at getting up, but also TMD symptom of the jaw pain or fatigue, and it was suggested that these pain and fatigue of the jaw caused jaw movement disorder and the trismus.

Free Research Field

補綴理工系歯学