Custom Hard Night Guard for Teeth Grinding and Clenching


Defend Your Teeth From the Daily Grind

Made with the safest, durable materials available, our hard night guard provides maximum protection against teeth grinding and clenching, the #1 cause of dental pain and discomfort. We understand the frustration and discomfort that come with this common problem, and that’s why we’ve designed a night guard that’s both effective and comfortable to wear.

Our Hard Night Guard is specially crafted to fit the unique contours of your teeth, providing a secure and snug fit that won’t slip or slide during the night. With its slim design, it’s the perfect balance of comfort and durability. Plus, it’s easy to clean and maintain, so you can enjoy long-lasting protection against teeth grinding without any hassle.

In just 3 easy steps!

three easy steps for custom made night guard

At Sentinel Mouthguards, we’re committed to providing our customers with the best possible products and service. Our team of dental professionals has years of experience in helping patients find relief from teeth grinding and clenching, and we’ve used that expertise to create a night guard that’s both effective and affordable. Trust us to be your partner in oral health and start enjoying a more peaceful, pain-free night’s sleep today.

  • Relieves jaw pain, teeth pain, headaches, tooth sensitivity
  • Protects teeth from breakage, cracking. Protects veneers and restorative dental work
  • Combats pain or tenderness of TMJ
  • Made in the USA! All materials are BPA, Phthalate, Silicone, MMA, Gluten & Latex FREE. Learn more about material safety here
  • Custom fit to your dental anatomy
  • Non-flexible. Snaps into place for a perfect fit.
  • Easy dental impression kit + extra putty if reattempt if needed
  • 30 day money back guarantee + 1 year replacement warranty if you crack or wear down your guard!
  • Free retainer case
  • FREE SHIPPING IN US (international customers are responsible for shipping on return mailer only)

Not sure whether to choose an upper or lower night guard? Get expert guidance here


Product Description

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

Thickness Options

Thin for Light Bruxism 1mm thickness  (think invisalign) can be worn comfortably night after night or as a daytime guard. This night guard secures your teeth in place and provides lasting durability for light teeth grinding and jaw clenching

Thicker for Moderate to Heavy Bruxism An added layer of thickness for more durability. Ideal for moderate teeth grinding or jaw clenching.

If you’re a severe teeth grinder or clencher, check out our Extreme Hard Custom Night Guard

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.

Wake up Smiling or Your Money Back

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 with a combined dental experience of 20+ years. We guarantee:

  • 100% satisfaction. We stand behind our products and will provide you with nothing less than our personal best from our long-standing team.
  • 30 Day Satisfaction Guarantee. If you don’t like your new custom guard whether it’s a fit issue or comfort, let us know within 30 days and we’ll refund you.
  • 1 Year Warranty. If you grind through your night guard within 1 year of purchase, we’ll replace it for you free of charge.

sentinel mouthguards flat teeth from grinding graphic


What you get

  • Dental impression kit. We send you plastic trays, dental putty, and a a prepaid envelope to mail back to us.
    You need to have a timer, clean hands, & good solid teeth. No braces. Seriously, putty & braces do not mix.
  • (1) Hard Custom Dental Night Guard
  • (1) Ventilated retainer case

If for any reason you feel your dental impression did not turn out well the first time around, don’t worry!  We will send you a redo kit free of charge.

Do you need your custom mouth guard as soon as possible? You can speed up the process by selecting the expedited shipping option during checkout. This option includes all-inclusive USPS Priority Shipping and a quick turnaround time of just two business days, so you can receive your mouth guard sooner and start enjoying the benefits of superior protection and comfort.




Additional Information

Weight3 oz

Thicker for moderate to heavy bruxism, Thin for light bruxism

Product Reviews

  • Tren Ly


    This is a solid product with great customer service. I’ve worn the OTC guards before and never could sleep a whole night with one in. My experience is the opposite with this custom fit night guard. I can barely tell I’m wearing it and my jaw feels so much better!! My experience has been excellent. I wish I had gotten this sooner.

  • Trent Laugerman

    Great night guard! Exactly what I wanted. Fast and easy process. The fit is great! I’m very happy with my purchase.

  • Amy A.

    Item arrived promptly and the fit is great. This is my favorite grinding guard thus far. My teeth are nice and straight but flat from years of grinding and just aging. I was using my old Invisilign tray but it wasn’t cutting it so I decided to with Sentinel. I have nothing but compliments to say. I recommend this item to anyone that grinds their teeth. Life saver and worth the investment!

  • Chris Klein

    Love Sentinel Mouthguard products. This one has protected my teeth longer than the one my dentist made me. -CK

  • SU Ingalls

    WOWZA! These mouthguards put all other mouthguards to shame! How can they fit so good, yet so inexpensive compared to my dentist? And comes with a 1 year warranty! Best night guard I’ve ever had. Literally obsessed with how good this fits. <3

  • Carol Thayer

    As always, Sentinel Mouthguards has knocked it out of the park yet again. Always great service, quick turnaround time and the fit of my night guard is impeccable. Their work is excellent. I greatly appreciate the attention to detail and the friendly experience.

  • Richard Hanson


    I did a LOT of research before choosing Sentinel. One thing I found that they offer is the 1 year warranty. I emailed to verify this and if my night guard cracks or wears through within 1 year, they will replace it up to 3 times! That’s a big plus for me because I’m a pretty heavy teeth grinder. The guard fits flawlessly. Service was quick and top notch! Teeth impression kit was easy and straight forward and they were patient in answering my many questions. I feel like I did the research for you guys. You will not regret choosing this company to make your custom mouth guard!

  • Olivia H.

    Impressed! Very good quality and the fit is exceptional. After many expensive teeth repairs, I have learned my lesson! Wear your night guard! This is the best guard in terms of fit and quality I have every had. This is the company I recommend buying from.

  • Lorna S.

    Two things: I LOVE this night guard and it was the process was much faster than I had expected. As soon as I took it out of the package I knew it was high quality. The fit is better than any other night guard I’ve worn. Will definitely be using this service again.

  • Christina Grimes

    This night guard is awesome! My teeth fit easily and comfortably inside the guard. I waited to review to see how long it would last. Usually by now the my old night guards that I’ve gotten in the past from my dentist start to crack or wear down but this one is still holding strong!

    I do take very good care of it and keep it in its case by my night stand.
    I clean mine once every week with Efferdent denture cleaning solution but I think that is a personal preference. I don’t want it to yellow!

  • Gavin Bellamy

    Thoroughly surprised! I’m very pleased with my purchase. Great quality at a great price!

  • Rachel Pennington

    I have been wearing night guards for over 10 years. All those years paying $600 every time I wore one out and I never thought to check online. The quality and fit are just as good as my dentist. I’ll never pay those kind of prices again. You have my business for life! <3 Rachel

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.