OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - J Orofac Pain JT - Journal of Oral & Facial Pain and Headache IS - 2333-0376 (Electronic) IS - 2333-0384 (Print) IP - 4 VI - 31 PST - ppublish DP - 2017 PG - 306-312 LA - en TI - Does Sleep Bruxism Contribute to Headache-Related Disability After Mild Traumatic Brain Injury? A Case-Control Study FAU - Suzuki, Yoshitaka AU - Suzuki Y FAU - Arbour, Caroline AU - Arbour C FAU - Khoury, Samar AU - Khoury S FAU - Giguère, Jean-François AU - Giguère J FAU - Denis, Ronald AU - Denis R FAU - De Beaumont, Louis AU - De Beaumont L FAU - Lavigne, Gilles J. AU - Lavigne G CN - OT - headache OT - polysomnography OT - rhythmic masticatory muscle activity OT - sleep bruxism OT - traumatic brain injury AB - Aims: To explore whether traumatic brain injury (TBI) patients have a higher prevalence of sleep bruxism (SB) and a higher level of orofacial muscle activity than healthy controls and whether orofacial muscle activity in the context of mild TBI (mTBI) increases the risk for headache disability. Methods: Sleep laboratory recordings of 24 mTBI patients (15 males, 9 females; mean age ± standard deviation [SD]: 38 ± 11 years) and 20 healthy controls (8 males, 12 females; 31 ± 9 years) were analyzed. The primary variables included degree of headache disability, rhythmic masticatory muscle activity (RMMA) index (as a biomarker of SB), and masseter and mentalis muscle activity during quiet sleep periods. Results: A significantly higher prevalence of moderate to severe headache disability was observed in mTBI patients than in controls (50% vs 5%; P = .001). Although 50% and 25% of mTBI patients had a respective RMMA index of ≥ 2 episodes/hour and ≥ 4 episodes/hour, they did not present more evidence of SB than controls. No between-group differences were found in the amplitude of RMMA or muscle tone. Logistic regression analyses suggested that while mTBI is a strong predictor of moderate to severe headache disability, RMMA frequency is a modest but significant mediator of moderate to severe headache disability in both groups (odds ratios = 21 and 2, respectively). Conclusion: Clinicians caring for mTBI patients with poorly controlled headaches should screen for SB, as it may contribute to their condition. AID - 851386