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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:
Fall 2010
Volume 24 , Issue 4

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Temporomandibular Disorder Patients’ Illness Beliefs and Self-efficacy Related to Bruxism

Marylee J. van der Meulen, MSc/Richard Ohrbach, DDS, PhD/Irene H.A. Aartman, PhD/Machiel Naeije, PhD/Frank Lobbezoo, DDS, PhD

Pages: 367–372
PMID: 21197508

Aims: To examine temporomandibular disorder (TMD) patients’ illness beliefs and self-efficacy in relation to bruxism, and to examine whether these beliefs are related to the severity of patients’ self-perceived bruxing behavior. Methods: A total of 504 TMD patients (75% women; mean age ± SD: 40.7 ± 14.6 years), referred to the TMD Clinic of the Academic Centre for Dentistry Amsterdam, completed a battery of questionnaires, of which one inquired about the frequency of oral parafunctional behaviors, including bruxism (clenching and grinding). Patients’ illness beliefs were assessed with a question about the perceived causal relationship between bruxism and TMD pain; patients’ self-efficacy was assessed with questions about the general possibility of reducing oral parafunctional behaviors and patients’ own appraisal of their capability to accomplish this. Results: Sleep bruxism or awake bruxism was attributed by 66.7% and 53.8% of the patients, respectively, as a cause of TMD pain; 89.9% believed that oral parafunctions could be reduced, and 92.5% believed themselves capable of doing so. The higher a patient’s bruxism frequency, the more bruxism was believed to be the cause of TMD pain (Spearman’s rho 0.77 and 0.71, P < .001) and the more pessimistic the self-efficacy beliefs were about the reducibility of oral parafunctions (Kruskal-Wallis χ2 = 19.91, df = 2, P < .001; and Kruskal Wallis χ2 = 7.15, df = 2, P = .028). Conclusion: Most TMD patients believe in the harmfulness of bruxism and the possibility of reducing this behavior. Bruxism frequency is associated with illness beliefs and self-efficacy. J OROFAC PAIN 2010;24:367–372

Key words: bruxism, illness beliefs, oral parafunctions, self-efficacy, temporomandibular disorders

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