Use of the Calmset 3 biofeedback/relaxation system in the assessment and treatment of chronic nocturnal bruxism

Biofeedback and nocturnal alarms using electromyographic (EMG) activity of the masseter muscles have often been used to treat nocturnal bruxism. However, although use of EMG activated nocturnal alarms has been successful, the clinical utility of the devices reported in the literature to date is questionable. For instance, many of the devices are cumbersome and specifically designed and constructed by the investigators. Hence, the purpose of the present investigation was to test the clinical utility of the Calmset (Thought Technology Limited, Montreal, Canada), a commercially available, user-friendly, compact, and portable EMG biofeedback instrument that may be used as an EMG activated nocturnal alarm. To meet this objective, the Calmset was used both to facilitate assessment and to treat an individual with chronic nocturnal bruxism. The results indicated that the patient exhibited fewer bruxing episodes following treatment and that treatment gains were maintained 6 months following termination of treatment. Advantages and disadvantages of using the Calmset are discussed.