Custom Hard Night Guard


Do you find yourself waking up with a sore jaw or pounding headache, wondering why your nights aren’t as restful as they should be? You might be one of the millions who suffer from nocturnal bruxism – the unconscious habit of grinding or clenching your teeth during sleep. But fret not, because relief is within reach.

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

  • Christian

    Took the quiz to find out which night guard I should get and it said a hard guard. I was skeptical that the hard one wouldn’t feel comfortable. First few nights took some getting used to but now I love it. The whole process was smooth, shipping was fast and easy and the night guard fits like a glove.
    Here’s a tip: When you take your dental impression, make sure your teeth are centered in the tray and sink your teeth into the putty all the way while holding still. Don’t move around. After 2 minutes or so, the putty should be hard and you can remove the tray. Make sure your impression looks correct before sending it in or they’ll have to send you a new kit. I sent in a picture of my impression and they were quick to respond. I hope this review helps someone!

  • Angela Meyer

    This is the best! I’ve tried many guards over many years of suffering from TMJ, and none worked or were comfortable to wear.
    This guard is extremely comfortable and really does help with relieving my jaw pain and protecting the teeth from grinding.

    Customer service team is very nice and fast.
    Excellent all around experience!

  • Bill Varzina


    I 100% recommend this dental night guard delivery service. They remove all of the excess plastic for a slim fit. Not at all bulky in the mouth and crafted with care. Thank you Sentinel team!

  • David Silver

    My teeth and jaw were so bad off before I started using the Sentinel guard. I have a 2mm upper. It’s a lifesaver! I can’t sleep without it now! 5 stars and I’d give 10 if I could!

  • BC

    This is my 2nd Sentinel night guard and I will never buy from my dentist again. He charged me $550 every time I went in for a new one and they never lasted more than a year. I will be a long time customer and will continue to recommend Sentinel Mouthguards.

  • Laura Mason

    Didn’t work out for me. I found out I needed extensive dental work after I ordered. Contacted the company and told them my situation. They issued my refund immediately. Suzanne is the sweetest! Thank you for making this easy for me and once I have all of my work completed I will definitely be back!

  • Nick W.

    Nothing fancy, but that was exactly what I was looking for! I hated how terrible my cheap, store bought guard fit. This does the trick and worth the wait!

  • Misty Larson

    This worked PERFECTLY. I clench my jaw during the day and at night and have sensitive teeth because of it. I had a $400 mouth guard from my dentist but it was so uncomfortable I couldn’t wear it. I chose the 2mm thickness after talking to customer service. It’s thin but the quality is still high. I will definitely never be buying guards from my dentist again. This is a wonderful product!

  • Jeffrey Hutchcroft

    I am sorry to say that the first go around was not a good fit. The lower part of the front teeth on the backside (tongue side) stuck out and cut into my tongue. I sent it back and they were able to smooth it out. Fits better now.

  • Steve Butler

    Really gets the job done! This is so fantastic. My teeth and I are thankful!

  • J. Dailey

    I HIGHLY recommend this bite guard! I found this company, read all the reviews and ordered. Took the guard to my hygienist and she was impressed! I’m a customer for life. Considering ordering a second as a backup!

  • D. Murphy

    The stress of the world was causing me to clench my jaw at night. I had a lot of soreness in my jaw. I chipped a tooth and after a lot of research gave this a try. This product has outstanding value as far as quality vs. cost goes.
    My dentist wanted to charge me $460 for a night guard. This is the first time I’ve been pain free in over a year. Thank you Sentinel!

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.