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Diagnostic validity of the use of a portable single-channel electromyography device for sleep bruxism

  • Sleep Breathing Physiology and Disorders • Original Article
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Abstract

Purpose

The aim of this study was to determine an appropriate cutoff value and the number of nights of sleep with the portable single-channel EMG device (GrindCare) necessary for a valid sleep bruxism (SB) diagnosis.

Methods

Twenty consecutive post-graduate students and staff at Bauru School of Dentistry composed the sample. Each participant underwent the GrindCare for five consecutive nights and the polysomnography (PSG). The discrimination between bruxers and non-bruxers was based only on the PSG analysis. Data about electromyography per hour with GrindCare (EMG/h) and PSG (bursts/h) were scored.

Results

There were positive correlations between the two devices for EMG/h and bursts/h in three and five consecutive nights. Bland-Altman analysis of the EMG bursts/h showed positive agreement between the methods. The receiver operating characteristic (ROC) analyses also showed that using a minimum of 18 EMG/h for three nights and 19 EMG/h for five nights in GrindCare as cutoffs resulted in a 90 % specificity and positive likelihood ratio equal to 5.

Conclusions

GrindCare is able to discriminate SB diagnosed by PSG and gold standard criteria, when used for three or five consecutive nights, and it may be a valid choice in clinical practice for SB assessment.

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Acknowledgments

This work was supported by FAPESP—Sao Paulo Research Foundation. The authors thank Maria Rita de Cássia Morateli Costa for scoring the PSG signals.

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Authors and Affiliations

  1. Department of Prosthodontics, Bauru School of Dentistry, University of São Paulo, Al. Octávio Pinheiro Brisola, 9-75, Bauru, SP, Brazil, 17012-901

    Juliana Stuginski-Barbosa, André Luís Porporatti, Yuri Martins Costa & Paulo César Rodrigues Conti

  2. Dr. Odont, Section of Clinical Oral Physiology, School of Dentistry, Aarhus University, Aarhus, Denmark

    Peter Svensson

  3. Department of Dental Medicine, Karolinska Institute, Huddinge, Sweden

    Peter Svensson

  4. Scandinavian Center for Orofacial Neurosciences (SCON), Stockholm, Sweden

    Peter Svensson

Authors
  1. Juliana Stuginski-Barbosa
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  2. André Luís Porporatti
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  3. Yuri Martins Costa
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  4. Peter Svensson
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  5. Paulo César Rodrigues Conti
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Corresponding author

Correspondence to Juliana Stuginski-Barbosa.

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Funding

National Counsel of Technological and Scientific Development—Brazil (142840/2011-4) and Sao Paulo Research Foundation (2012/01396-2) provided financial support in the form of researcher funding. The sponsor had no role in the design or conduct of this research.

Conflict of interest

P. Svensson is a paid consultant for Medotech A/S. Other authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements) or non-financial interest (such as personal or professional relationships, affiliations, knowledge, or beliefs) in the subject matter or materials discussed in this manuscript.

Ethical approval

All procedures were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Stuginski-Barbosa, J., Porporatti, A.L., Costa, Y.M. et al. Diagnostic validity of the use of a portable single-channel electromyography device for sleep bruxism. Sleep Breath 20, 695–702 (2016). https://doi.org/10.1007/s11325-015-1283-y

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  • DOI: https://doi.org/10.1007/s11325-015-1283-y

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