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
Over the past two nights I awoke from sleep with the NTI in my mouth. The NTI is a potential choking hazard. If there were a "stopper" connected to the NTI outside of the the mouth it would be safer. Perhaps if it were even larger, covering more teeth, that may help. Aside from the choking scare, it is well constructed and I found it to be unaffected by the rigors of grinding.
Do NOT use the NTI night guard. After 4 years of nightly use it is obviously that my front teeth no longer make contact--there is a gap between upper and lower incisors. I wish I had known this was a possibility--I was very satisfied with the full mouth guard previously. I am hoping the dentist and/or Keller Lab will take responsibility for potential repairs!
I have used the NTI for about 10 years now. When I first started to use it I noticed a little wear on my bottom front teeth due to my grinding/clenching. Since then I've combined the use of the NTI with a full-piece bottom mouthguard made out of acrylic. ( I only use them at night when I sleep.) Now if I grind my teeth at all, the NTI slides easily against the bottom mouthguard and none of my teeth receive any wear. More importantly I believe that I'm not clenching as hard and that I have fewer headaches. I think the NTI and the bottom mouthguard are the perfect combination!!! I recommend them to anyone.
after consulting a "specialist" for intense clenching and resulting TMJ issues I was sold an NTI as the supposed best solution for the problem. Never once was it mentioned to me that the potential existed for this appliance to move my teeth. I wore 3 NTI's in as many years, as each would break after about a year of nightly wear. At $600 a pop, this wasn't a cheap exercise. There was some reduction in my pain and headaches but still some tension in the joint itself as Im sure there was still some pressure exerted as I slept with it in, although less than without it. When the 3rd started showing signs of loosening I casually googled the appliance and stumbled upon the warnings of teeth moving and open bite developing as a direct result of wearing an NTI - went to the mirror and low and behold, my teeth had moved substantially but gradually enough that I hadn't noticed it. Not once had the "specialist" I was seeing even suggested checking for any movements, he was happy just to pass a bill for another $600 each time. No follow ups required either, just to go back if I could move it out of my moth with my tongue alone. Its been 6 months since I stopped wearing it. In that time I'm clenching more than ever, developed terrible sensitivity due to increased recession and I'm now staring down the barrel or periodontal work and orthodontics to deal with the fall out. DO NOT wear this device!!!!
My husband and I have used these for years. When I use it, I no longer wake up with a headache that lasts 4-6 hours, even with 800 mg of ibuprofen. I haven't had any issues with my teeth moving. Love it!
I have also been negatively affected by the NTI appliance. My story mirrors the other comments here. I wore mine for 4-5 years, and never noticed that it slowly moved my front teeth outwards, until one day I could no longer rip things open with my front teeth! Pretty upsetting, after my parents paid for braces when I was younger. However, NTI was a little more helpful than my 1st nightguard for preventing the awful "clenching headache" and muscle tension...
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".