Patients who clench or grind their teeth at night can cause significant damage to their teeth. The biting surfaces of the teeth can wear and flatten, chip, or crack. Night guard appliances help protect the teeth from these parafunctional habits. The appliance is made of a hard plastic/acrylic material that fits over the biting surface of the top teeth. An impression is taken in office and sent to the lab for night guard fabrication. Upon delivery in office, any adjustments are made by the dentist to insure that the appliance is comfortable and functional.