N-nociceptive-pain and discomfort
T-trigeminal-the nerve that brings feeling to the lower face and jaw
I-inhibition
TMJ and joint pain, as well as facial muscle pain and headaches can be due to parafunctional (abnormal) grinding and clenching of the teeth. Clicking and popping of the jaw joints can be indicative of a problem, but only if there are other symptoms present (pain, headaches, tenderness in the facial muscles). The key to any treatment involves keeping the jaws from clenching, especially during sleep, where most of the damage is inflicted.
A traditional dental mouthpiece, or splint, reduces the resistance to side-to-side movement thereby reducing the effort and resultant strain to the jaw joint and sinuses (so long as clenching intensity isn't too intense). However, the same splint also provides an ideal clenching surface, where maximum clenching intensity may increase and/or allow jaw joint problems to perpetuate.
The FDA has cleared, for the first time, a device that prevents medically diagnosed migraine pain, tension-type headache, and jaw disorders ("TMJ"), without drugs or surgery, through the reduction of trigeminally innervated muscular activity.
The N.T.I. Tension Suppression System is a prefabricated polycarbonate matrix that a dental practitioner retro-fits to the patient's teeth . It is completely different from any other type of mouthpiece. It is very small and comfortable to wear, since it doesn't cover an entire arch of teeth.
A functional role of the lower incisors is to monitor the hardness of food. The more direct and intense the pressure, the more suppressed the closing activity. For example, if while biting into a spare rib, if the lower incisors contact the bone, the closing stroke stops. This is the nociceptive trigeminal inhibition reflex. The NTI appliance keeps you from contracting your facial muscles intensely alleviating facial and jaw pain, as well as reducing the intensity of headaches, as well as their onset.