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

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

  • Susan Ward

    Great mouth guard! Extremely sturdy and high end.

  • Lina Da Costa

    This is it! Best night guard and great customer service!!
    A high quality custom made night guard for this price? This is fantastic and just what I’ve been looking for. I have only used it a few nights but this is awesome so far. If this works well and lasts, you have a customer for life!

  • Amanda Piloti

    Customer service is outstanding! Suzanne was there to answer all of my questions beforehand. Very happy with my purchase. Will recommend! *****

  • Garin Day

    This was a great purchase. My teeth had finally gotten to the point of no return and I had to do something. This fits perfectly. Easy instruction and feels Great!!!!!

  • JL Brooks

    The quality is unmistakable as is the comfort.
    This guard is the perfect fit and just like the one I ordered from my dentist years ago. This is the real deal. I highly recommend -JL

  • Calvin Macolor

    This night guard lasted me over 6 years and I just ordered my 2nd one. High quality and well worth it. Beats the heck out of going to the dentist.

  • Lori G.

    Fabulous product! Should have done this a long time ago. My jaw pain has gotten so much better. After the first night I noticed a huge difference. During the day, I don’t experience the popping and clicking like I used to. I recommend this.

  • Charmaine Jackson

    Best night guard ever!! Hands down. Better than my dentist. The company is professional, prompt and courteous. Most of all, they make an excellent product. I have recommended to multiple family members and friends. Keep up the good work Sentinel!

  • Jaimie

    Comfortable, easy to fit and sturdy! I’ve worn through 2 night guards from my dentist. If you grind your teeth while sleeping this is the product for you.

  • Trung D.

    Fast and affordable. Great delivery service for custom night guards. My dog loves these lol so it’s a good thing I have found an alternative to my expensive ass dentist! Thank you!

  • Sharon K.

    Thumbs up!! Went through a different company initially. It didn’t pan out. Won’t go into the story with that but this was a much better experience. The night guard is slim despite it being the thickest one. It covers about halfway up my teeth. Not too tight. But most importantly I’m not grinding my teeth anymore! Thank you.

  • Tiffani Jones-Papania

    Teeth impression kits arrived quickly. They supply an extra putty pack for a re-attempt. I ordered a lower guard so I did take 2 impressions of the lower teeth and sent in a picture to the email. They replied almost immediately with a yes to the impression picture. Received the guard in the mail within about 1 1/2 weeks after sending in the impression. Guard is thick and durable but that’s good because I’m a heavy teeth grinder. It took a few nights of wearing it to get used to it as this is my first experience with a custom made night guard. I have worn the cheap plastic ones from the store and they’re not comparable to the quality of this one. Very satisfied with the experience. 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.