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

  • Custom fit to your unique dental anatomy
  • 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 temporomandibular joints
  • Easy dental impression instructions guarantees consistent teeth impression results
  • 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 for durability. Safe for nightly use.
All of our night guard products are BPA, Silicon, Latex and Phthalate free.

If for any reason, you experience pain or discomfort while using your product please discontinue use and contact us. 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!

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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 the USA 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 (whether it’s a fit issue or comfort) let us know within 90 days. We’ll keep working with you to your satisfaction.
    • 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.

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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).

Additional Information

Weight3 oz


Guard for


Product Reviews

  • Concetta Ellis

    This was better thank I expected. I admit I was a little frustrated with the putty impression process. I was so nervous to take my teeth impression and of course I didn’t do it correctly the first time. I finally settled down and got a nice impression of my teeth. It was easier than I thought it would be.
    The Sentinel lab crew took care to make my guard fit perfectly from the impressions I sent. I’m happy with the final product and will reorder again when the time comes.

  • Eric

    Replacement for an old one I lost or grew legs! This company is consistently awesome. I ordered years ago. Loved my last guard and was a bit worried that things may have changed over the years and the quality might not be the same. But like a good wine, these guys seem to get better with age. Thank you again Sentinel! Cheers!

  • The Walsers

    Thank you Sentinel! Affordable prices, great fit and great customer service. My husband and I thank ya much!

  • Timothy

    Excellent! I use it every night. Now I can’t be without it. 5 stars!!

  • Chelsea

    Great price for a great product
    This is a fantastic find for a great price.

  • Nancy

    BEST MOUTH GUARD I HAVE FOUND! This is a 5 star product, way cheaper than the dentist and fits perfect.

  • Leah Delaney

    After my dentist told me I needed a guard to prevent teeth grinding, he tried to sell me one of his night guards. When that didn’t work because of the astronomical cost of the guard he wanted to sell me, I was then referred to an ENT doctor. I was told to stress less, take magnesium and wear a night guard. I was about to give up when I did a search and selected this company because of the positive reviews. I’m adding another positive review.

    So far, I have had only positive things to say about this experience.

    For this night guard you will need to take upper and lower dental impressions.
    I received the kit quickly and read the instructions thoroughly but I still had a few questions and called the company and customer service was great. My questions were answered.

    I was apprehensive about making the mold. I tried placing the mold tray in my mouth and gagged. The company representative (Suzanne?) told me to use the slightly larger tray because I should not hit the tray with my teeth. They include two tray sizes but an additional size is available should the included ones not fit properly. It’s also important to mix the molding clay properly into a consistent color before inserting into the tray.

    Set a timer for 3 minutes. You need a full 3 minutes with the molding clay/tray in your mouth for the mold to form properly. Try doing this in front of the mirror. If you fail you can call the company and they will supply you another kit at no cost.

    After you make the mold you need to send a photo to and they will confirm whether it is successful before you mail it to the lab in a self-addressed, prepaid envelope.

    It took about 10 days from the date of mailing for the guard to arrive.

    The guard comes with a free retainer case.

    My guard required no additional adjustments but the company will help you should you need it.

    This was my first guard and has worked successfully so far. According to the company, the guard should last about 2 years. They also keep the impressions on file for 1 year from the date of purchase in case you need to reorder.

  • Cristina C.

    I researched a lot of other companies and they didn’t require the upper and lower teeth impressions. I like that they make sure the bite is correct. I was skeptical because it’s so much cheaper than the dentist but I got my guard and waited to weigh in. The guard fits perfect and I’ve been sleeping soundly for several weeks now. This is the real deal. Thank you for existing Sentinel. You’re a tooth saver!

  • Jay R

    More comfortable than I expected! Extremely happy! *****

  • Carl S.

    This is the only brand I trust. I’ve been a Sentinel customer for 10 years. Their customer service is great. They’re consistent and I love their night guards. I have a no-show day guard that I wear during the day and the extreme durability guard at night. Nothing less than a positive experience for me. 5 stars!

  • Veronica Kong

    Glad I gave them a try!

    It didn’t work out for me at first because right after I placed my order, my tooth broke and I needed a new crown. I called them and they told me I could hang on to the teeth impression kit until my dental work was completed. Well, it took me 1 year to save up for the crown. I called and they still honored my order. That’s what I call great customer care! I received my new night guard and it fits beautifully. Happy customer!

  • Martha K.

    Love my night guard. I took a star away from it because they could make the teeth impression instructions more clear! Took me 3 tries but at least the redo kits they sent out were free.
    Received the guard and it’s the best one I’ve ever owned. Been wearing night guards since the early 90’s so I’ve gone through my fair share. Overall, a good company with a good product.

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.