However, we now understand that a significant cause of nocturnal bruxism is airway instability during sleep, such as what occurs in Upper Airway Resistance Syndrome (UARS) and Obstructive Sleep Apnea (OSA). Intuitively, this makes sense.
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How to Change the Color of your Facebook Profile. Many Facebook users I know don't realize they can modify their Facebook page!...1  How to Change the Appearance of the Wall in Facebook.any Facebook users I know don't realize they can modify their Facebook page! But you can!! Unlike MySpace, Facebook doesn't allow you to insert custom html codes to modify your profile. This is one of the features that makes Facebook so unique.