The American Academy of Orofacial Pain defines temporomandibular disorders (TMD) as a group of disorders involving masticatory muscles, temporomandibular jpoint (TMJ), and associated structures that have a multifactorial cause. 1 TMD may have a muscular or articular origin. 2 Myofascial pain, a condition of muscular origin, is characterized by localized muscle tenderness and regional muscle pain 3 and may be associated with mouth-opening limitation, 4 being the most prevalent diagnosis among those affected by TMD. 5 Although the literature could not properly clarify the relationship between TMD and bruxism, the latter seems to act as a risk factor
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