Reduction of sleep bruxism events according to contingent electrical stimulus intensity

Author:

Kawahara Shigehito1,Kusunoki Takayuki1,Arikawa Kaori1,Inoue Taro1,Kawamoto Akiyo1,Takahashi Kazuya1,Shimada Akiko12ORCID

Affiliation:

1. Department of Geriatric Dentistry Osaka Dental University Osaka Japan

2. Department of Oral Health Sciences, Faculty of Health Sciences Osaka Dental University Osaka Japan

Abstract

AbstractBackgroundAlthough biofeedback with contingent electrical stimulation (CES) has demonstrated the reduction effect on sleep bruxism (SB), the relationship between the actual applied CES intensity and efficacy remains uncertain.ObjectiveThis study aimed to investigate whether the reduction of bruxism events and jaw muscle symptoms could vary according to the intensity of CES and in probable sleep bruxers.MethodsTwenty probable sleep bruxers were initially screened for bruxer confirmation based on a 2‐week recording of SB events with a portable electromyography recorder (BUTLER®GrindCare®, GC4). A 3‐week recording was conducted without CES using a GC4, followed by another 3‐week recording with CES. At baseline and before and after the CES (+) session, clinical muscle symptoms were assessed using a 0–10 numerical rating scale (NRS). The relationships between the actual applied CES intensity and the number of SB events/hour, as well as the NRS of clinical muscle symptoms, were analysed.ResultsThe actual applied CES intensity was positively correlated with the reduction rate of the number of SB events/hour (R = .643, p = .002), as well as with the reduction rate of NRS for pain, unpleasantness, fatigue, tension and stiffness (R > .500, p < .011).ConclusionHigher CES elicited a more robust reduction in SB events and clinical muscle symptoms, in probable bruxers. Prior to selecting CES biofeedback as a management option for SB, it would be beneficial to assess the tolerance threshold of CES in each bruxer in order to predict the effectiveness of CES in probable sleep bruxers.

Publisher

Wiley

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