The primary reason for tension headache is the exertion in the masticatory muscles. NTI appliances are contemporary devices for alleviating tension in the masticatory muscles and are very popular among the clinicians mostly because of the elaborate marketing propaganda. The stabilization splints are old fashioned appliances for treatment of tension in the masticatory muscles and have proven to be very effective. The NTI appliance is easy to use and requires little readaptation, the stabilization splint requires regular readjustments. The NTI appliances are factory made while the stabilization splints are manufactured individually for each patient.