In 1998, James P. Boyd developed a splint to treat and prevent headaches and bruxism. He named it the “nociceptive trigeminal inhibition splint” (NTI). The NTI night guard has the distinction of covering only the front teeth. According to Dr. Boyd, pressure on the front teeth should reduce the intensity of the involuntary contractions that people with bruxism suffer from. In other words, with the NTI night guard, you should not be able to clench as hard as you normally do.
It is important to know, for anyone thinking about getting a NTI mouth guard that its benefits have only been evaluated over short periods of time. Some reports have been made of alteration in the position of the teeth in bruxers who wore this device for a long period.
To use a NTI night guard, you need to have it adjusted by a dentist who had previous training with the NTI. To find a dentist, use one of the links below:
In canada: http://www.nti-tss.ca/pages/finddds.htm
In the US: http://www.theheadacheremedy.com/fad.php
In our opinion, it is not advisable to use the NTI night guard. It does not completely protect the teeth. As stated in the requirements for a good mouth guard, a night guard should cover all teeth, not just the front teeth.
If you do decide to go for the NTI, make sure to have frequent follow-ups with your dentist. Your dentist should tell you if there is any alteration in your teeth. Price for the NTI device range from $250 to $600. It is the important follow-ups that explain the high price of this night guard.
Keep in mine that for a lower price, you can easily get a custom made night guard that protect all your teeth. For this reason and those specified above, we strongly recommend you use a custom night guard instead of the NTI guard. Learn more at Step 1.
Have you tried the NTI night guard? Post your review below.
Submit your review
This appliance ended up moving my front tooth out, dramatically affecting my bite and allignment and causing both my daughter and
I to have to spend $4,000 to have "Invisiline " repositioning procedure
done on both of our mouths.
Terrible invention!! This was only after 5 months!
Never ever use the NTI, no matter how appealing or convincing your dentist makes it sound.
I used the NTI for 6 years after headaches/jaw pain related to teeth grinding. After noticing a gradual open bite over the years, I consulted a new dentist and they said the open bite was certainly caused by the NTI and I would need orthodontic treatment to fix this bite.
Long story short: NTI did very little for my TMJ symptoms, caused an open bite and now I need to spend $5,000 on braces when I didnt need them as a child.
I have worn the NTI guard for over 15 years and have never had a problem. My grinding/clenching was eliminated immediately and the resulting headaches and jaw/teeth pain have been gone for 15 plus years. My dentist periodically checks the fit during a routine visit and there has never been a problem.
Caused more trouble than it helped. Recession that I did not have in the gums over my front teeth gradually started after wearing this. I also got my first ever cavity at age 36 on one of the covered front teeth while using it. Figured out in my sleep how to shift my jaw so I could make my molars touch again and ended up in worse pain than without a night guard. Stupid little "tooth".
I've been wearing my NTI for 12 yrs. I clench my teeth at night and wake up with a headache, sore teeth & jaw. The NTI stopped that. When I don't wear it, I definitely know it! I paid $600 for mine & when I lost it, I bought another one for $600. That's how much I need this thing! I recently changed dentists & she freaked that I had been wearing an NTI. She was sure my teeth had supraerupted. They have not. They look great & are healthy. Her conclusion was that it works for me & to keep wearing it.
I stumbled across this site, and as it referenced me directly, so I thought I should provide some insight.
The NTI was not developed for ”bruxism”, but rather, for high intensity clenching that the common nightguards, even the one promoted and sold on this site, have no effect on. The NTI’s primary indication cleared by the FDA is for the prevention of medically diagnosed migraine pain. I wore a full splint for years, yet my headaches, migraines and joint pain persisted. The neurophysiology of the jaw clenching muscles dictates that pathologically intense contractions CANNOT occur *unless* the molars or canines touch each other, or if something is sandwiched in between (like the typical splint). ”Pressure on the front teeth”, as the author of this site claims I say, is *not* what limits muscle contraction intensity, rather, it’s the ABSENCE of molar contact. Done properly, there is no ”pressure” felt on the patient’s front teeth. If there is, the device is improperly provided.
Over 3/4 million NTI devices have been professionally delivered. In a recent study of over 74,000 cases, 1.6% reported undesired jaw repositioning. That’s no more that what occurs with traditional nightguards, but since those are completely custom provided by private practitioners, there’s no ”brand name” device to complain about. The hundreds of thousands of comfortable and satisfied NTI patients aren’t flooding the internet with glowing testimonials, but the hundreds who have not have success continue to search for relief, and tend to be vocal about their NTI experience.
If all one requires is protection of their teeth from grinding, and is without symptoms, then any full-coverage device, even the one sold on this site, is fine. However, when there are symptoms involved, it’s irresponsible to suggest that a device of the NTI’s design is contraindicated.
Comment from webmaster Marc:
Thank you Doctor for this additional information. While I do realize you may have a competing interest, I would be happy to look at the recent study you mentioned. Can you provide a link to this study?
I got this due to my grinding and clenching. This was suggested because of my clenching and how quickly I would probably bite through a full mouth piece.
After 6 months I was told to stop wearing it as I was having more jaw pain than I was initially.
I now have an open bite, more jaw pain, and just had to have an occlusal analysis to try to figure out how to fix everything now.
Don't use this device! I now have an open bite because of the NTI. It did not prevent me from clenching, just caused my front teeth to be pushed apart ... and I clench now more than ever!
I wore a nti for 6 years. I noticed my face changed as well as my bite. I now have an open bite and overjet. I have been looking into how to correct the damage this has caused. If anyone has had this corrected before, can you please give me some feedback on the treatment you received? So far I am only hearing I need to extract teeth to make room to correct with braces. Thank you
I wore an NTI for about 10 years. At first, it seemed like a good thing. My back teeth couldn't touch, so I wasn't clenching as badly and my teeth were protected from one another. However, eventually my back teeth could touch. My dentist then made a larger NTI to prevent them from touching. This was repeated multiple times until I had both NTIs on both the top and bottom front teeth. Finally, my dentist looked at the latest set of impressions and was amazed that I could function: my bite was 10 mm open! (i.e., my front teeth were 1 cm apart when my back teeth touched) The change was gradual, so I don't know when I could no longer bite through anything with my front teeth. I have gone without a night guard for 6 months now, and my bite is "only" 5 or 6 mm open. I am now trying to figure out if this can be fixed with braces alone, or if jaw surgery + braces will be required. If your teeth can't touch, they start trying to find each other, so my teeth are totally out of alignment. Please do your research before wearing a device like this!