Extreme Hard Night Guard for Heavy Teeth Grinding


Extreme Durability Hard Night Guard for Severe Teeth Grinding and Jaw Clenching (Bruxism)

Made with dentist-grade, hard acrylic-like material, your Extreme Durability Hard Night Guard is non-flexible and built to last. Safe for nightly use or as recommended by your dentist.

  • Custom fit to your unique dental anatomy
  • BPA, Silicone, Gluten, Latex, MMA and Phthalate free. Learn more about material safety here.
  • 3mm thickness for maximum protection
  • Non-flexible. Snaps into place for a perfect fit
  • Relieves jaw pain, teeth pain, headaches, tooth sensitivity
  • Protects teeth from breakage, cracking, damage
  • Protects veneers, crowns, restorative dental work
  • Combats pain or tenderness of the TMJ
  • Easy dental impression instructions + extra putty if a reattempt is needed
  • Excellent durability and clarity
  • Love it or your money back! Guaranteed to make you smile.

What You’ll Get

  • A complete impression kit with instructions, extra putty and prepaid return mailer
  • (1) custom night guard for heavy duty teeth grinding and jaw clenching
  • Breathable retainer case
  • Fast all inclusive FREE shipping
  • 1 year warranty
EAN: 697566004698 SKU: 14188 Categories: , , ,

Product Description

Extreme Hard Night Guard for Heavy Duty Teeth Grinding and Jaw Clenching

Made with dentist-grade hard acrylic-like material, your Sentinel Night Guard is non-flexible and built to last. Safe for nightly use.

All of our night guard products are BPA, Gluten, Silicone, MMA, Latex and Phthalate free.

Learn more about the safety of our mouthguard materials here

Our commitment to you is 100% satisfaction. We provide free night guard adjustments and will always work to make you smile.

Not sure which night guard to choose? Take our 60 sec. quiz!

which night guard is right for you


Wake up Smiling or Your Money Back

The Sentinel Guarantee

Located in St. Petersburg, Florida, we specialize in night guard and mouth guard manufacturing.  All of our products are made in our lab by professional lab technicians.

We guarantee:

    • 100% unconditional money back guarantee. We stand behind our products and will provide you with nothing less than our personal best from our long-standing team. If you’re not completely satisfied, return within 90 days for a full refund.
    • 90 Day option to let us get it right. If you don’t love your new night guard let us know within 90 days. We’ll work hard to make it right!
    • 1 Year Warranty.


Due to its thicker nature, we require that you take upper and lower teeth impressions for an even bite and to ensure proper occlusion.

take your dental impression with me

Defend Your Teeth Against The Daily Grind

3mm thickness is ideal for severe nighttime grinding or jaw clenching.

FREE SHIPPING IN THE USA (international customers are responsible for shipping on return mailer).

Product Reviews

  • L.B.

    Best purchase I ever made 3 years ago and here I am again to order a new one! You guys are great!

  • Rick Meranus

    Received my guard over the weekend and have only worn it a couple of nights but so far it’s amazing. Already feeling better! No headaches and my teeth are not hurting during the day anymore. I’ll update again after a couple of months to give some feedback on durability but so far so good.

  • Thomas Creel

    I went through several online companies before finding yours. I had to return every single one of them for various reasons. Hands down best fitting guard I’ve ever worn. You guys are exceptional and have my business as long as I’m grinding my teeth! -Thomas

  • S. Johnson

    My night guard fits perfectly & is quality
    Would not hesitate to use this company again

  • Dominic Shoopman

    This is my second purchase from this company courtesy of my dog chewing the last one. Before I found Sentinel, I had spent $500 on the same thing from the dentist.

    Making one impression takes about 5 minutes from start to finish. You do have to take a second impression of your lower teeth too (also takes 5 min.) so allow about 20 minutes total to familiarize yourself with the instructions, etc.

    Make sure you mix the two different color putties together quickly until they are one color, then you put it in the tray and press your teeth and you’re done! Mail it off and you have a mouth guard back in about a week. Very easy, and well worth the money.

  • L D

    I’m not a person who writes reviews but this company deserves a glowing one! After emailing Chasity with some questions, I felt comfortable placing my order. They make the molding process super easy to follow. I mailed the impressions back and within a week my new guard arrived. It was beautifully crafted and fits perfectly. The attention to detail is apparent. This is an exemplary company that I will be using from now on.
    I love that this service is available and my teeth thank you!

  • Scott R. Perez

    Returning customer and I’m please with this replacement. I did have to take a new dental impression as I learned they only keep the impressions on file for 1 year. This replacement guard is just like the one I received several years ago. Consistent, good work. Thanks

  • Lola Gavine


    First try with the dental impression kit was unsuccessful but they include an extra packet of putty so I was able to get a nice teeth impression the second time around. I emailed the company a picture and they verified the impression was sufficient. Mailed it in and the mouth guard came about a week later. I am extremely impressed with the fit and quality. Just the same as my dentist only hundreds of dollars less!

  • J.S. Owens

    My first time ordering from this brand. Impression kit came very quickly and included extra putty in case I needed it. The cost is worth it to be able to complete it from home without having to go to the dentist. The product fits very well and has really helped reduce my jaw pain.

  • Steven Daniels

    Customer service is remarkable! I had ordered from another company and after messing up my impression, they tried to charge me $25 to send out another impression kit. Sentinel sent one for free. No questions asked. They’re fast, friendly and less expensive than the dentist. I highly recommend. *****

  • Lauren Maysi

    This mouth guard has helped my jaw tremendously! I could barely chew before wearing this. My jaw was so bad off I was making crunching sounds while I ate and had to chew softly.
    I’m still trying to be mindful of my eating but NOT due to pain from grinding and clenching. Thank you!

  • Johnny S.

    Durable enough to handle my jaws and that’s saying a lot! I have gone through so many of these but the material is strong and I love that they don’t add any resins or acrylics. I’m sensitive to chemicals. This is the safest, best night guard I have found! A++++

Free Shipping

We ship your kit with everything you need from the molding trays and putty to the prepaid return packaging.

90 day guarantee

Try it out! If you’re not satisfied, you can always return the Mouthguard within 90 days for a full refund.

Save 20%

By entering coupon code "big spender", you save 20% on orders over $200.