Teeth grinding is the phenomenon of involuntary contraction of the masticatory muscles still in a non-physiological state, causing rhythmic and intermittent clenching and grinding of the upper and lower teeth, which in turn interrupts the normal physiological resting position of the jaw, and is a non-physiological tooth contact. Simply put, this is an abnormal action of involuntary clenching or constant grinding of the upper and lower jaw teeth when not eating. This is a harmful non-physiological movement of the oral system. The etiology of teeth grinding is very complex, and the etiological mechanism is still inconclusive. At present, it is believed that it is related to mental factors, neurological factors, occlusal factors, neuromuscular dysfunction of the oromandibular system, as well as endocrine disorders and genetic factors, which is a synergistic relationship leading to the disease.
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