Sleep bruxism (SB) is a repetitive jaw muscle activity characterized by grinding or clenching of the teeth (Lobbezoo et al., 2013) and it is a possible risk factor for various ailments and disorders in the stomatognathic system, such as dislodgement of dental restorations, tooth fracture, tooth wear, periodontal disease and temporomandibular disorder. Studies have been conducted on the relationships of SB genesis with increase in sympathetic nerve activity, sleep state and genetic factors (
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