Durability Mouth Guard for Heavy Teeth Grinding and Clenching


Defend Your Teeth Against The Daily Grind

Are you grinding your teeth so badly that you’re waking up with headaches, a sore jaw and sensitive teeth? Severe teeth grinding can affect so much more than your quality of sleep. We know how uncomfortable and frustrating this can be, which is why we created the Sentinel Mouthguards Durability Mouth Guard for Heavy Teeth Grinding and Clenching.

Our Durability Mouth Guard for Heavy Teeth Grinding and Clenching is specifically designed to withstand intense teeth grinding and clenching, offering superior protection and durability for even the most severe cases. Made from a strong, durable material, our mouthguard 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.

At Sentinel Mouthguards, we understand that finding the right solution for your heavy teeth grinding and clenching can be a challenge. That’s why 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 mouthguard that fits perfectly to your unique dental profile, ensuring maximum protection and comfort.

Just 3 Easy Steps!

3 east steps to receive your daytime mouth guard

With years of experience and expertise in the dental industry, you can trust Sentinel Mouthguards to provide you with the highest quality products and exceptional customer service. Say goodbye to the discomfort and pain of teeth grinding and clenching, and say hello to a better, more comfortable you with the Sentinel Mouthguards Durability Mouth Guard for Heavy Teeth Grinding and Clenching

  • Protect your teeth from damage and breakage. Our guards are designed to shield your teeth from the toughest impacts.
  • Relieves jaw pain, teeth pain, headaches, tooth sensitivity and more
  • Enjoy complete peace of mind with a custom fit that conforms perfectly to your unique dental anatomy.
  • Choose American-made quality you can trust. We never outsource our work, so you can be confident you’re getting the best product possible.
  • Our products are free of BPA, silicone, gluten, latex, MMA, and phthalates.
  • Experience unbeatable protection with our 3mm thickness. Whether you’re clenching or grinding your teeth, our guards will keep you safe.
  • Keep your guard securely in place with our non-flexible design. Say goodbye to slipping and sliding, and enjoy complete comfort.
  • Preserve your dental work with confidence. Our guards protect veneers, crowns, and other restorative dental work.
  • Combat TMJ pain and tenderness with ease. Our guards are the perfect solution for those suffering from TMJ-related issues.
  • Enjoy hassle-free molding with our easy dental impression kit. Plus, we include extra putty if you need a reattempt.
  • Our products are backed by our love it or your money back guarantee. We’re confident you’ll be completely satisfied with your purchase.

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, free shipping in the USA  (international customers are responsible for shipping on return mailer).
  • 1 year warranty

Product Description

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

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

Crafted from dentist-grade, hard acrylic-like material, our night guard is built to last and features a non-flexible design that ensures maximum protection against teeth grinding and clenching. Safe for nightly use, our night guard is made with the safest dental materials available, including BPA, gluten, silicone, MMA, latex, and phthalate-free materials.

example of damage from teeth grinding and jaw clenching

Wake Up Smiling with Our Money-Back Guarantee

The Sentinel Guarantee

As a leading manufacturer of custom night guards and mouth guards based in St. Petersburg, Florida, we take pride in providing high-quality products that are tailored to your unique needs. Our night guards are made in our own lab by experienced lab technicians, ensuring that each guard is designed to meet our exacting standards.

We stand behind our products with our Sentinel Guarantee, which includes:

  • 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.

which mouth guard is right for you? Take our free quiz
Not sure which night guard is the best fit for your needs? Take our quick 60-second quiz and find out! Our quiz is designed to help you identify the right mouthguard for your unique dental profile and specific concerns. With just a few simple questions, you’ll receive personalized recommendations tailored to your needs and preferences.


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.

With our at-home dental impression kit and easy-to-follow instructions, you can take your own dental impression in just a few minutes. Our experienced lab technicians will use your impression to create a custom-fit night guard that’s tailored to your unique needs.




Additional Information

Weight3 oz
Guard For

Upper teeth (most preferred), Lower teeth


Non-binary (all dental tray sizes will be included), Male, Female

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.

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.