Hard Dental Night Guard for Teeth Grinding and Clenching


The Hard Dental Night Guard Is for Light to Moderate Teeth Grinding/Jaw Clenching (Bruxism)

Need help deciding whether to choose an upper or lower night guard? Click here

  • 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 instructions + extra putty if reattempt if needed
  • Relieves jaw pain, teeth pain, headaches, tooth sensitivity
  • Protects teeth from breakage, cracking. Protect veneers and restorative dental work
  • Combats pain or tenderness of TMJ
  • 90 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)

Product Description

Want your night Guard faster? Choose the expedited shipping option at checkout. This service includes all inclusive USPS Priority Shipping + a (2) business day turnaround time

Hard Dental Night Guard for Teeth Grinding & Jaw Clenching

Choosing Your Thickness

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 Durability Hard Night Guard

Not sure which night guard is right for you? Take our quiz!

choose my night guard

The Hard Dental Night Guard fits snug & snaps to your teeth. It is an exact fit and leaves plenty of room for jaw movement.

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.
  • 90 Day Satisfaction Guarantee. If you don’t like your new retainers whether it’s a fit issue or comfort, let us know within 90 days and we’ll refund you in full.
  • 1 Year Warranty. If you grind through your night guard within 1 year of purchase, we’ll replace it for you free of charge.

FREE SHIPPING IN THE USA (international customers are responsible for shipping on return mailer).

Here’s how it works

protect your teeth

Taking your own dental impression is EASY (and you do not need to pay a dentist hundreds of dollars to do it).

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 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.




Additional Information

Product Reviews

  • 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

  • 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.

Free Shipping

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

90 day guarantee

Try it out! If you’re not satisfied, you can always return the Mouthguard within 90 days for a full refund.

Save 20%

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