Durability Mouth Guard for Heavy Teeth Grinding


Extreme Strength, Ultimate Protection

Not all teeth grinding habits are the same. Heavy teeth grinding can wreak havoc on your smile and affect so much more than your quality of sleep. We understand the short and long term effects of heavy, chronic teeth grinding and clenching. Teeth wear, cracks, chips and sensitivity don’t just happen overnight but once it begins, costly dental repair is needed. This is why we created a durable mouth guard built to protect your smile.

Protecting Smiles, Wallets Too

Ask any dentist- there is simply nothing better to eat, laugh, talk and chew with than natural teeth. With Sentinel Mouthguards, your teeth are comfortably protected and your tooth structure stays preserved.

Our Durability Mouth Guard for Heavy Teeth Grinding is specifically designed to withstand intense teeth grinding and clenching, offering superior protection for even the most severe cases. Made from a strong, durable material, our mouth guard is engineered to absorb and distribute the force of your teeth grinding and clenching, protecting your teeth and jaw from the damaging effects of this common problem.

Experience the difference in just three simple steps:

Here's how it works 3 easy steps

Our simple and easy-to-use mold kit allows you to create a mold of your teeth from the comfort of your own home. Once we receive your mold, we’ll create a mouthguard that fits perfectly to your unique dental profile, ensuring maximum protection and comfort.

Say no to shortened, cracked teeth and hello to a healthy smile.

sentinel mouthguards smile

  • Prevents teeth from grinding and clenching
  • Relieves jaw pain, teeth pain, headaches, tooth sensitivity
  • Protects your teeth from fracture lines, chips, cracks and breakage
  • Prevents teeth shortening (from grinding and clenching)
  • Prevents long term dental issues and future dental repairs
  • Promotes better sleep and better oral health
  • Made in the USA
  • Safest materials. Our mouth guards do not contain BPA, silicone, gluten, latex, MMA, and phthalates.
  • Preserve your dental work with confidence. Our guards protect veneers, crowns, and other restorative dental work.
  • Our products are backed by our love it or your money back guarantee. We’re confident you’ll be completely satisfied with your purchase.

Expert Fit by Professional Lab Technicians

Since 2012, we have helped thousands of people just like you overcome their battle with teeth grinding and clenching. We’ve developed a simple and easy-to-use mold kit that allows you to create a mold of your teeth from the comfort of your own home. Once we receive your mold, we’ll create a mouth guard that fits perfectly to your unique dental profile, ensuring maximum protection and comfort.


Product Description

Sentinel Mouthguards Durability Night Guard: Non-Flexible, Long-Lasting, and Safe

Rise and Shine Grinning, Backed by Our Money-Back Promise

The Sentinel Guarantee

Crafting top-notch custom night guards and mouth guards right from St. Petersburg, Florida. We’re all about premium quality, uniquely tailored to you. Our skilled lab experts create each night guard, ensuring they meet our strict benchmarks. Your satisfaction, our priority.

  • 100% unconditional money-back guarantee: We’re confident that you’ll love your new night guard, but if for any reason you’re not completely satisfied, simply return it within 30 days for a full refund.
  • 30-day option to let us get it right: If you don’t love your new night guard within the first 30 days of receiving your guard, we’ll work with you to make it right. Our goal is to ensure that you get the best possible fit and protection for your teeth.
  • 1-year warranty: We also offer a 1-year warranty on all of our night guards, giving you added peace of mind and protection.

Due to the thicker nature of this mouth guard, we require that you take upper and lower teeth impressions for an even bite and to ensure proper occlusion.

why choose sentinel mouthguards graphic compare to dentist made custom night guard

How does it work?

Get ready for a seamless experience. We’ll send an impression kit with all you need for a precise dental mold. Mix, mold, and send it back in the prepaid envelope. Your custom mouth guard is crafted in 3-4 days. It’s hassle-free and ships for free!

What you’ll get:

  • A complete impression kit with instructions and prepaid return mailer
  • (1) Durability Night Guard
  • Breathable retainer case
  • 1 year warranty
  • Fast all inclusive FREE shipping

Avoid expensive dental repairs from teeth grinding and clenching

example of damage from teeth grinding and jaw clenching

Not sure which guard is right for you? Get expert guidance with our 60 second quiz!

find your night guard match now graphic

Our Commitment To You

At Sentinel Mouthguards, we’re committed to your satisfaction. That’s why we provide free night guard adjustments and always work to make sure you’re completely happy with your purchase.

Since 2012, we have helped thousands of people just like you overcome their battle with teeth grinding and clenching. We’ve developed a simple and easy-to-use mold kit that allows you to create a mold of your teeth from the comfort of your own home. Once we receive your mold, we’ll create a mouth guard that fits perfectly to your unique dental profile, ensuring maximum protection and comfort.


Additional Information

Weight 3 oz
Guard For

Upper teeth (most preferred), Lower teeth

Product Reviews

  • Melissa Chung

    It took me quite a while to actually start wearing a night guard. I let my TMJ get so bad that I was experiencing a crunching sound in my jaw. I couldn’t afford the ones from the dental office so decided to give this a try. I’ve had this guard now for a few weeks and my jaw feels SO MUCH BETTER. I have to wear it every night. There were a couple of nights I forgot to put it in and I felt it the next morning. Now, it’s not completely gone. I still have some mild pain but nothing like what I was experiencing. With complete gratitude, thank you Sentinel.

  • Mark Sampet

    I chose Sentinel Mouthguards largely because I’ve heard nothing but good things about their customer service. I’m happy to report that my experience was wonderful. They make it easy, fast and friendly! In this crazy world that we live in, I appreciate their extra effort to ensure that I am satisfied. Thank you Sentinel Mouthguards!!

  • Leah B.

    Okay here is my experience with Sentinel Mouthguards:

    The process is easy but you have to pay attention to the impression instructions. I failed my first two attempts because I mixed the putty for too long the first time and the second time I distorted the impression because I moved the tray around while it was in my mouth. Both times were admittedly my fault but I was still frustrated at the time it happened.

    The customer service is excellent. They were prompt and friendly. Sent me a new kit with no charge. I got a great impression of my teeth. Waited about a week and 1/2 and sure enough my mouth guard came. It comes in a black retainer case. I tried it in and it fit well. Took me a few nights to get used to it but the quality is great and I saved so much money going the online route instead of my dentist. Not to mention the hassle of driving back and forth.

    I wear mine nightly. I called and they gave me some cleaning instructions. Pretty simple. Use a mild soap and a soft toothbrush. Make sure you rinse it well and dry it completely. This will prevent yellowing. I’m already seeing a few grind marks on the guard but better on the guard than my teeth grinding together!

    Overall, I highly recommend Sentinel Mouthguards. The experience was impressive and quick.

  • Lindsey R.

    I ordered a lower guard to start. When I received it, I realized my tongue likes to flick it up at night. I called the company and they switched me to an upper guard. I already had the upper impression on file with them because with these heavy duty guards, they require both an upper and lower teeth impression. Super easy and convenient! I was sent the upper teeth guard and it fits perfectly. This product is excellent and the customer service is amazing!

  • Angelina Musik

    A+ service. I recommend to all of my family and friends!

  • Jamie T.

    Can’t believe I’m writing a product review for a mouth guard but it’s really that good.

    I have gone through so many professionally made dental night guards and I’ve never liked any of them.
    This mouth guard is not only a great value but it fits over my teeth perfectly. Because they take the time to shape it to the contours of my teeth, it actually fits to my teeth like a glove. Just because you pay to have a custom made night guard doesn’t mean that it’s going to fit like this. I have had several guards made by dentists that didn’t fit this good! These technicians know what they’re doing. I recommend this company to everyone I know and I’m happy to write a glowing review for them.

  • Leo Kreft

    Great company! Great product! I highly recommend Sentinel Mouthguards!

  • Kimberly Strickland

    Best sleeping night guard I’ve ever used

    Much easier to sleep in than the one I got from my dentist. It’s still thick but much less bulky if that makes sense.
    May purchase a second one while it’s at this price (dentist charged $500).

  • Nick Doty

    I bought this on Amazon originally and have been a customer ever since. Great find and the price is right. Wearing a night guard has helped me tremendously.Instead of waking up with my jaw screaming at me, I just wake up like a normal person now. I do have to wear mine nightly and notice that the jaw pain starts creeping back up on me if I’m not consistent. The teeth impression kit is straight forward and they give you an extra putty if you mess up.

  • Tasha H.

    Although my first guard didn’t fit right, Sentinel was quick to make me a free replacement and it fit perfectly. I didn’t mind the hiccup because I literally saved hundreds of dollars by not going through my dentist. Easy to get used to wearing and I love their attention to customer care!

  • Becca Faulk

    I have tried night guard from other online manufacturers for heavy teeth grinding and this is the best. Fit is good, fast delivery.

  • James Ramos

    Needed an adjustment. They had me print out a tooth chart and circle the teeth area that the guard was too tight. I sent it in and it was very quickly returned to me with the correct adjustments. My guard fits great now and I am pleased with the service.

Free Shipping

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

30 day guarantee

Try it out! If you’re not satisfied, you can always return the Mouthguard within 30 days for a full refund.

Save 20%

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