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.
Inaccurate information provided here
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?
Wore for 6 months
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 it!
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
Beware of long-term use (i.e., more than a week)
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!
NTI works for me
My dentist suggested the NTI to correct my clenching and grinding. I find that when I wear it I am unable to close my mouth enough to allow my jaw muscles to clench the way they have in the past. It was super easy to get used to. I fell asleep easily he first night wearing it. I wake up with sore teeth, sore jaw muscles, and headaches if I don't wear it. I wake up with no pain if I do wear it. My dentist suggested this over a traditional guard because he said it retrains your muscles rather than just giving you something to gnaw on at night. My NTI is worn on my top 4 front teeth has a large bit of plastic between my upper and lower front teeth which is why I think it works so well.
I miss mine
I had one that I got YEARS ago and I grinded it down till it snapped in half. It lasted over 5 years. I can't sleep without it. I bought a $30 night guard from walmart but it isn't as good as my NTI was. It's very uncomfortable. I've had a full mouth night guard made and I never made it through the night with it in my mouth. Extremely uncomfortable. With my NTI I could no longer spit it out. I literally had to use my hand to take it off. My back teeth never touched so it worked for my entire mouth. I only gave 4 stars because it did move my bite around but not by much and quite frankly, I don't care. It's worth it. I'm saving up for a new one and can't wait to get one again. I miss it sooooo much!!
I have worn my first NTI since 2003. It only gave out after 9 years... however, the new one (one year old) is now broken in half! Be sure that the fit is not ground down too far initially. I think the dentist tried to make it as natural a fit as possible, taking the ridge down and weakening the structure. I'm hoping they will replace it, because it cost me $500 to get! ($300 for the first one, $500 for the second... go figure)
As for their effectiveness, it has been great for me. The seal to my teeth has never been an issue and I would recommend it.
i was always taking or spitting it out at night
i was always taking or spitting it out at night and the composite that molded it to my teeth often wore out and i had to get it refitted.
NTI is easy
I have used NTI nightly for 15 years. I have dental check-ups every 4 months and there have been no adverse effects on teeth.
What I like most about it is that it is easy to wear all night, easier than other night guards that have been made for me.