Abstract
The aim of this study was to investigate the possible association between sleep bruxism and sleep-disordered breathing. Twenty-six patients who snored (nine women and 17 men) participated in this study. All-night polysomnographic recordings, including masseter electromyography (EMG), were performed in all subjects. The frequency of masseter contraction (MC) episodes was measured. Masseter contraction episodes were classified under the phasic and tonic forms. The analyzed data indicated that the termination of apnea and hypopnea events are often accompanied with tonic MC. It is suggested that tonic MCs can be linked to apnea and hypopnea episodes.
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