Clenching occurring during the day is influenced by psychological factors?

2014 Fiscal Year Final Research Report

• Project/Area Number: 24792100
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Prosthetic dentistry
• Research Institution: Iwate Medical University
• Principal Investigator: ENDO Hiroshi 岩手医科大学, 歯学部, 非常勤講師 (10613086)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: クレンチング / 心理特性

Outline of Final Research Achievements

We investigated the relationship between clenching occurring during the day under natural conditions and psychological attributes.Subjects were 16 dentistry students and staff. A portable EMG recording device was used to record muscle activity in the temporal muscles for a continuous 5-h period under subjects’ natural conditions, including having lunch. Clenching was identified by electromyography, and subjects were categorized into clenching and non-clenching groups. Psychological testing was performed during the same period using the Modified Taylor Manifest Anxiety Scale (MAS), the Self-rating Depression Scale (SDS), and the Cornell Medical Index (CMI), and the psychological attributes of clenching and non-clenching groups were compared.
Daytime clenching was shown to be associated with anxious tendency. Total muscle activity in the clenching group was 3.2 times greater compared with the non-clenching group.

Free Research Field

クレンチング