Custom Hard Night Guard


Custom Comfort, Unmatched Protection

Clenching or grinding your teeth can lead to a range of discomforts, including headaches, jaw pain, and increased teeth sensitivity. Moreover, this habit often results in the gradual deterioration of teeth, leading to wear, cracks, chips, and even breakage.

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.

Guarding Your Grin and Your Green

Ask any dentist- nothing beats the joy of eating, laughing, talking, and chewing with your natural teeth. By choosing Sentinel Mouthguards, you not only ensure comfortable tooth protection but also save big on high dental costs, keeping your precious tooth structure and your budget intact.

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.

sentinel mouthguards smile

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.

Experience the difference in just three simple steps:

Here's how it works 3 easy steps

At Sentinel Mouthguards, our goal is simple: giving you top-notch products and amazing service. Count on us to be your partner in oral health, so you can enjoy nights of peaceful sleep without any discomfort. Start your journey to a better night’s sleep now!

  • 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! 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

Rise and Shine with a Grin or Your Money Back

Nestled in the heart of sunny St. Petersburg, Florida, we’re masters at creating top-notch night guards and mouth guards. Our entire range of products is proudly crafted on American soil by our longstanding team of dental professionals. And here’s our rock-solid pledge to you:

  • 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.

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

Should your first attempt at a dental impression miss the mark, there’s no need to stress. We’re here to help by providing a free redo kit, no questions asked.

We’re proud to announce our recognition as Forbes’ Best Night Guard choice for 2023

hard night guard voted best of 2023 forbes health

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

find your night guard match now graphic

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 Durability Night Guard

sentinel mouthguards flat teeth from grinding graphic

Did you know you can fast track your order?

Looking to fast-track your custom mouth guard delivery? Make the most of our expedited shipping choice while checking out. With inclusive USPS Priority Shipping and a mere two-day turnaround, you’ll be enjoying the perks of optimal protection and comfort in no time.

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



Additional Information

Weight 3 oz

Thicker for moderate to heavy bruxism, Thin for light bruxism

Product Reviews

  • Jerry Chua

    At first I bought night guards from Proteeth but these are much better.

    A few things to note:
    1. Don’t remove the putty from the tray after impression has been taken. Keep it in the plastic tray & mail the whole thing back.
    2. Mix the putty fast. I mixed too slow the 1st time & had to redo. They included an extra putty set so it wasn’t a problem.
    3. They offer free adjustments if its too tight.

    Really impressed with this product, incredibly easy to follow instructions and if you follow them, you’re left with a secure fitting, comfortable and perhaps most importantly a better nights’ sleep.

    I know another reviewer was worried that reboiling wouldn’t be effective since they might be similar to other mouth guard brands. That is true. You cannot boil the Sentinel Mouthguard. However, if you take your mold correctly you will not need to do anything but wear it. It wasn’t the most comfortable process but worked.

  • Kim

    I received my mouth guard and am very happy with the product so far.
    It was a bit nerve racking finding an internet company to fulfill this need. I’m glad I found Sentinel.
    I have been telling everyone I know about it and I’ve found most of my friends and family have mouth guards.
    I will continue to talk about it and hope to send some folks your way.

  • Mary Bedenborough

    This is a review about their customer service. This product just didn’t work for me. I have a very bad gag reflex and was unable to use the trays to take my teeth impressions. I opened and used the impression kit they sent out and called them to tell them that I couldn’t complete the process. They were so kind and issued my full refund immediately. Didn’t even have to send back the materials! Even though I didn’t end up getting a night guard, I was so pleased with the way they handled my issue. I will be back if I can ever get past this horrible gag reflex! Thank you again Sentinel. -Mary

  • Tracy C.

    I am a severe grinder and had an extensive amount of dental work to correct cracked and shortened teeth. I’ve even cracked crowns. I was a bit skeptical about Sentinel but figured it would save me a lot down the line since I average about a night guard every 18 months. My $650 custom night guard has hairline cracks all over after just one year. The process was thoroughly explained in the email and customer service has been excellent. It felt tight at first, but I’ve already gotten used to it after just 3 nights. Not only that I saved $$$, I don’t have to go to the dentist’s for fitting, which alone is a big hassle. I cannot be happier!

  • Bree Patterson

    100% Satisfied Customer!!

    I’ve been through so much with my jaw. Popping, pain while eating, teeth was dominating my life but I couldn’t afford the dentist made ones. I opted to go with Sentinel Mouthguards and I couldn’t be more pleased.
    The mouth guard fits beautifully and my pain is GONE!
    You guys are serious life savers.

  • Cam D. Jones

    This is a lifesaver for me! I was cracking my teeth and having horrible jaw pain. The store bought guards weren’t cutting it and the dental office price is unbelievably high. I chose Sentinel Mouthguards because of the price point and the 1 year warranty. So glad I did. Absolutely terrific company with a great product!

  • Lyza R.

    Very satisfied customer. I was blown away by the exceptional customer service and quality product. Would recommend to anyone.

  • Jose T.

    Can’t imagine why I will ever return to a dentist for a dental night guard. You guys are a serious money saver. Thanks bunches :))

  • Darren Brock

    This team really does go to great lengths to meet customer satisfaction. I messed up my first dental impression and was quickly shipped another for free. Then wanted to change types after I received my soft night guard. They upgraded me and I just had to pay the difference in price. Way more flexible than my money hungry dentist! Great customer service.

  • Briana Snellgrove

    When my dentist said he’d give me a deal on my second night guard I was stil heartbroken at the price. So thankful for the internet. Also, pro tip: I use castile soap to clean my mouthguard. Dr. Bronners on Amazon sells a big bottle of it. Better than the harsh toothpastes and denture cleaning solutions! Mouthguard fits perfectly . A+++

  • Josh Turner

    Communication is fantastic! The dental impression kit instructions are informative and detailed enough that I can actually tell what’s going on. I took a great impression the first time around. Thanks Guys- GREAT SERVICE

  • Ronnie C

    Customer service is outstanding. I had a lot of questions and Alexandra was extremely knowledgeable, professional and kind. I got my night guard within two weeks of sending the impression off. Fit is excellent. I chose the 2mm because I wanted strength but wanted to keep it thin in my mouth since I’m a light sleeper. This company is very professional. Couldn’t be more thrilled to have found you guys. Thank you!

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.