Teeth grinding and clenching also known as Bruxism generally occurs during sleep and can often go undetected. Bruxism is generally caused by psychological stress, anxiety and tension in your waking life. Bruxism causes chips in the teeth, wear of the biting surface and cracks in the teeth. This wears down tooth enamel, removes the sharp biting surfaces and flattens the edges of the teeth. An Occlusal Splint (also called a bite splint or night guard) is a removable dental appliance carefully molded to fit the upper or lower arches of teeth and is worn at night to reduce the amount of grinding pressure transferred to the teeth. It offers relief for the muscles of the jaw and protection of the teeth from wear and breakage.