Sleep Bruxism Sleep Bruxism is a stereotyped movement disorder characterized by grinding or clenching of the teeth during sleep.  The disorder has also been identified as nocturnal bruxism, nocturnal tooth-grinding and nocturnal tooth-clenching.
What are the Symptoms?
The symptoms of Sleep Bruxism are tooth-grinding or tooth-clenching during sleep that may cause:
•        abnormal wear of the teeth
•        sounds associated with bruxism (It's about as pleasant as fingernails on a chalkboard!)
•        jaw muscle discomfort
How serious is the disorder?
Some people have episodes that occur less than nightly with no evidence of dental injury or impairment of psychosocial functioning. And others experience nightly episodes with evidence of mild impairment of psychosocial functioning. Yet others have nightly episodes with evidence of dental injury, tempomandibular (jaw) disorders, other physical injury or moderate or severe impairment of psychosocial functioning.