Introduction The nonfunctional habits of awake and sleep periods have been described as important risk factors in the development and prolongation of functional disorders and orofacial pain. Of these, awake bruxism seems to be the most harmfultothepatient;however,thepresenceofeachfactor amplifies the effect of the other. In fact, the two types of bruxism are not independently associated but interact additively [1,2]. Despite some similarities, awake and sleep bruxism have different etiologies and pathophysiologies  and should be seen as distinct entities . A recent proposal for the definition of awake bruxism described it as a repetitive jaw-muscle activity characterized by the clenching or grinding of the teeth and/or the bracing or thrusting of the mandible during wakefulness and associated with prolonged duration of weak muscle contraction [5,6]. Lavigne  suggested that the prevalence of awake bruxism in the general population was about 20%. Winocur  reported that 70.9% of patients with sleep bruxism also suffered from awake bruxism. Sato [ 9] and Glaros  suggested that the percentage of time that a
person spends “touching” the teeth during the awake period is considerably longer than the time spent “clenching” the teeth. In addition, prolonged teeth contact, especially at lowlevelsof contraction, hasbeen associatedwith paininthemasticatorymusclesandtheskull[11,12]anda higherfrequencyofTMD[13,14].Satoshowedthat50%of patients with masticatory myalgia had a habit of keeping their teeth in contact during wakefulness . Despitetheknowledgeabouttheproportionalassociation betweenparafunctional habits, emotional stress, and the increase in the dysfunction of muscle activity, many questions about the etiology of these muscular-skeletal disorders remain to be answered [15,16]. In relation to therapy, some studies, such as the one by Glaros , have suggested that the reduction of dental contacts, throughtechniquesofhabitreversion,couldbeapromisingmechanismforthereliefoffacialmusclehyperactivity and its associated hyperalgesia. Considering the relationship between pain, bruxism, and emotional stress, it was also observed that there was a correlation (64%) between muscle pain in the morning and muscle pain at the end of the previous day, which, in turn, had a correlation (56%) with the clenching of the….