Clinical evaluation of removable partial denture prosthesis treatment based on the coordination of the jaw and neck muscle activity and the jaw and head movements.

• Project/Area Number: 25463028
• 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: Nihon University
• Principal Investigator: ISHII Tomohiro 日本大学, 松戸歯学部, 助手 (50246922)
• Co-Investigator(Kenkyū-buntansha): NARITA Noriyuki 日本大学, 松戸歯学部, 准教授 (10155997) ; KAMIYA Kazunobu 日本大学, 松戸歯学部, 助手 (30267108)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 咀嚼 / 顎運動 / 顎筋活動 / 頸筋活動 / 頭部運動 / 周波数解析 / 伝達関数 / コヒーレンス関数

Outline of Final Research Achievements

For the purpose of the clinical evaluation of the effects of denture prosthesis and the functional relationship between jaw, neck and head, we analyzed the coordination between the jaw and neck muscles and the head movement. The coherence and phase exhibited a significant positive correlation, and the negative correlation between the coherence and lateral component in jaw movement in the non-chewing side neck muscle activity was presented in healthy subjects. Individual difference has been shown for the coordination of the jaw and neck muscle activity referred to jaw movement and head movement. In the denture patient, dentures wearing increased the coordination between the jaw and neck muscle activity and jaw movements, and the coordination between the activities of closing muscle and head movement was increased. The coordination in the activities between jaw closing muscle and jaw movement in TMD patients presented the lower values in coherence than that of healthy subjects.

Research Products

• [Journal Article] Evaluation of jaw and neck muscle activities while chewing using EMG-EMG transfer function and EMG-EMG coherence function analyses in healthy subjects (2016)
  • Author(s): Tomohiro Ishii, Noriyuki Narita, Hiroshi Endo
  • Journal Title: Physiology & Behavior Volume: 160 Pages: 35-42
  • DOI: 10.1016/j.physbeh.2016.03.023
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] リズム性顎頸筋活動の関数解析 (2015)
  • Author(s): 石井 智浩, 成田 紀之, 神谷 和伸
  • Organizer: 第15回日本大学口腔科学会
  • Place of Presentation: 日本大学松戸歯学部(千葉県松戸市)
  • Year and Date: 2015-09-06
• [Presentation] 顎運動と顎頸筋活動との協調性を定量する (2015)
  • Author(s): 石井 智浩, 成田 紀之, 神谷 和伸, 小見山 道, 内田 貴之, 金田 隆
  • Organizer: 第28回日本顎関節学会学術大会
  • Place of Presentation: 名古屋国際会議場（愛知県名古屋市)
  • Year and Date: 2015-07-04
• [Presentation] EMG coherence between jaw and neck muscles during chewing performance (2014)
  • Author(s): Tomohiro Ishii, Noriyuki Narita, Kazunobu Kamiya
  • Organizer: 2014 IADR
  • Place of Presentation: Cape Town
  • Year and Date: 2014-06-25 – 2014-06-28
• [Presentation] 咀嚼時の下顎側方運動成分と顎頸筋活動の対応 (2013)
  • Author(s): 石井智浩、成田紀之、神谷和伸、河相安彦、遠藤博史
  • Organizer: 日本補綴歯科学会第１２２回学術大会
  • Place of Presentation: 福岡国際会議場（福岡・博多）
• [Presentation] 咀嚼時の顎・頸筋活動と下顎運動との協調性に関する定量解析 (2013)
  • Author(s): 石井智浩、成田紀之、神谷和伸、河相安彦
  • Organizer: 第１３回日本大学口腔科学会学術大会
  • Place of Presentation: 日本大学松戸歯学部（千葉）