Sleep Bruxism in Children: Prevalence and Multidisciplinary Therapy
Bruxism
consists in a movement characterized by tooth grinding, attrition or clenching.
According to the International Classification of Sleep Disorders, the bruxism
is a movement disturb related to sleep, characterized repeated contractions of the
masticatory muscles, resulting in grinding or clenching of the teeth.
Although some
similarities can be found between wake-time and sleep bruxism, differences
related to state of consciousness and oral motor excitability are present. In
the wake-time bruxism, the individual is often not aware of the habit, and is
frequently related to vicious habit; on the other hand, sleep bruxism is an
unconscious activity of clenching or grinding the teeth, producing sounds while
the individual is sleeping. In sleep bruxism, there are exacerbated occlusal
forces duringthe parafunctional activity in periods of no conscience. These occlusal
forces were not inhibited by cortical and subcortical proprioceptive mechanisms
and, thus, a lot of signs and symptoms in masticatory system may be observed,
possibly because of a higher arousal threshold of tissues.
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