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Quintessence Publishing: Journals: OFPH
Journal of Oral & Facial Pain and Headache

Edited by Barry J. Sessle, BDS, MDS, BSc, PhD, FRSC

Official Journal of the American Academy of Orofacial Pain,
the European, Asian, and Ibero-Latin Academies of Craniomandibular
Disorders, and the Australian Academy of Orofacial Pain

ISSN 2333-0384 (print) • ISSN 2333-0376 (online)

Publication:
Spring 2013
Volume 27 , Issue 2

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Epidemiology of Bruxism in Adults: A Systematic Review of the Literature

Daniele Manfredini, DDS, PhD/Ephraim Winocur, DMD/Luca Guarda-Nardini, MD, DDS/Daniel Paesani, DDS/Frank Lobbezoo, DDS, PhD

Pages: 99-110
PMID: 23630682
DOI: 10.11607/jop.921

Aims: To perform a systematic review of the literature dealing with the prevalence of bruxism in adult populations. Methods: A systematic search of the medical literature was performed to identify all peer-reviewed English-language papers dealing with the prevalence assessment of either awake or sleep bruxism at the general population level by the adoption of questionnaires, clinical assessments, and polysomnographic (PSG) or electromyographic (EMG) recordings. Quality assessment of the reviewed papers was performed according to the Methodological evaluation of Observational REsearch (MORE) checklist, which enables the identification of flaws in the external and internal validity. Cut-off criteria for an acceptable external validity were established to select studies for the discussion of prevalence data. For each included study, the sample features, diagnostic strategy, and prevalence of bruxism in relation to age, sex, and circadian rhythm, if available, were recorded. Results: Thirtyfive publications were included in the review. Several methodological problems limited the external validity of findings in most studies, and prevalence data extraction was performed only on seven papers. Of those, only one paper had a flawless external validity, whilst internal validity was low in all the selected papers due to their selfreported bruxism diagnosis alone, mainly based on only one or two questionnaire items. No epidemiologic data were available from studies adopting other diagnostic strategies (eg, PSG, EMG). Generically identified “bruxism” was assessed in two studies reporting an 8% to 31.4% prevalence, awake bruxism was investigated in two studies describing a 22.1% to 31% prevalence, and prevalence of sleep bruxism was found to be more consistent across the three studies investigating the report of “frequent” bruxism (12.8% ± 3.1%). Bruxism activities were found to be unrelated to sex, and a decrease with age was described in elderly people. Conclusion: The present systematic review described variable prevalence data for bruxism activities. Findings must be interpreted with caution due to the poor methodological quality of the reviewed literature and to potential diagnostic bias related with having to rely on an individual’s self-report of bruxism. J Orofac Pain 2013;27:99–110. doi: 10.11607/jop.921

Key words: awake bruxism, bruxism, epidemiology, prevalence, sleep bruxism, systematic review

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