The Journal of the Korean dental association (대한치과의사협회지)

The Korean Dental Association (대한치과의사협회)
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Electromyographic activity of masseter and temporal muscle at daytime clenching in adult and adolescent sleep bruxers

수면 이갈이 습관을 가진 성인 및 성장기 아동 부정교합자의 낮시간 이악물기시 나타나는 교근 및 측두근의 근활성도에 관한 연구

  • Jang, Insan (Department of Orthodontics, College of Dentistry, Gangneung-Wonju National University) ;
  • Lee, Kyoung-Hoon (Department of Orthodontics, College of Dentistry, Gangneung-Wonju National University) ;
  • Choi, Dong-Soon (Department of Orthodontics, College of Dentistry, Gangneung-Wonju National University) ;
  • Cha, Bong-Kuen (Department of Orthodontics, College of Dentistry, Gangneung-Wonju National University)
  • 장인산 (강릉원주대학교 치과대학 치과교정학교실) ;
  • 이경훈 (강릉원주대학교 치과대학 치과교정학교실) ;
  • 최동순 (강릉원주대학교 치과대학 치과교정학교실) ;
  • 차봉근 (강릉원주대학교 치과대학 치과교정학교실)
  • Received : 2017.04.11
  • Accepted : 2017.07.06
  • Published : 2017.09.30
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Abstract

Objective: To compare the electromyographic activity of masseter and temporal muscles between bruxers and nonbruxers in adult and adolescent patients. Material and Methods: The samples composed of the surface electromyography (EMG) recordings obtained from the orthodontic patients. Sixty-eight patients who had bruxsim habit (43 female and 25 male) were divided into four groups according to their age and gender. Control groups consisted of 79 patients who had not bruxism habit. EMG of the masseter muscle and anterior temporal muscle were recorded before treatment in clenching at maximum intercuspation. The ratio of temporal and masseter muscle activity (T/M ratio) was compared between bruxers and nonbruxers in adult and adolescent patients. Results: EMG of masseter muscle and temporal muscle were significantly higher in adult male bruxism group than control. T/M ratio in adult male bruxism group was significantly lower than in adult male nonbruxism group. However, there was no significant difference in T/M ratio between adolescent bruxism group and adolescent nonbruxism group. Conclusions: The balance in the activity of the masseter and temporal muscles may not differ between bruxers and nonbruxers during adolescent periods. However, in adult period, the masseter muscle activity against temporal muscle is greater in males with bruxism habit compared to non-bruxer.

Keywords

Acknowledgement

Supported by : 강릉원주대학교치과병원

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