Hard Day or Night Dental Guard 1mm or 2mm


The Sentinel Hard Dental Night Guard® is for light to severe teeth grinding/jaw clenching (bruxism)

  • Custom fit to your unique dental anatomy.
  • Non-flexible. Snaps into place for a perfect fit.
  • Easy “how to” instructions ensures consistent teeth impression results
  • Excellent durability and clarity.
  • Choose your own thickness (1mm for light teeth grinding, 2mm for moderate to heavy)
  • Can be used for daytime or nighttime (for daytime choose a 1mm thickness)
  • Relieves jaw pain, teeth pain, headaches, tooth sensitivity
  • Protects teeth from breakage, cracking, damage
  • Protects veneers, crowns, restorative dental work
  • Combats pain or tenderness of the temporomandibular joints
  • Lifespan 2-5 years
  • All materials are Phthalate, BPA, Silicone & Latex FREE
  • 90 day money back guarantee. We take all the risk!
  • One year replacement guarantee 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

It's been a hard days' night and you should be sleeping like a log!

Here's how it works

taking your own dental impressionTaking 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 will send you a plastic tray, dental putty, & 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) Sentinel Hard Dental Night Guard
  • 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.

All inclusive free shipping in the US


Want your Sentinel Hard Dental Night Guard faster? Choose the expedited shipping option at checkout. This service includes all inclusive USPS Priority Shipping + a (2) business day turnaround time ($79 additional charge).

Sentinel Hard Dental Night Guard

.40 (1mm thickness) ultra thin, hard dental night guard can be worn comfortably night after night or as a daytime guard. This hard stint secures your teeth in place and provides long lasting durability for light to moderate nighttime grinders.

.80 (2mm thickness) An added layer of thickness for extra durability. Ideal for nighttime grinding or jaw clenching. Suggested for moderate to heavy grinders.

A tip when deciding which night guard is right for you:

Keep in mind that your teeth may naturally shift over time. The Sentinel Hard Dental Night Guard fits snug & perfectly snaps to your teeth. It is an exact fit and leaves plenty of room for jaw movement. If your desire is to wear your night guard consistently (every night or at least several times a week) the hard acrylic night guard will be an excellent choice. If you know you will not wear your night guard on a regular basis, the Sentinel Dual Laminated Night Guard or the Sentinel Soft Dental Night Guard may be a better choice as they are both more adaptable and offer that little bit of "wiggle room".

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 break or grind through your night guard within 6 months of purchase, we’ll replace it for you free of charge.

Get Fitted. Get Protected.

FREE SHIPPING IN THE U.S.A (International customers are responsible for shipping on return mailer).



Additional Information

Weight3 oz

Product Reviews

  • Leslie Prestage

    Perfect fit. No need for adjustments. This is a very well made product. Super professional. I will update this post if needed but have been very happy so far!

  • Brendan W.

    Ok so heads up this will be a weird review and I am giving this such a high review for a reason despite the fact that I hate wearing a night guard. Period

    But here is why it gets a perfect review other than price:

    The night guard fits precisely to my teeth. The low profile makes it not press so tightly onto my teeth. It’s literally perfect. Not too tight but snug. The thing is, if you ARE a night guard wearer and have gotten lucky enough to have found a perfect guard, congratulations. I was not so lucky until now. This guard beats all other guards I have tried by a metric mile.

    Now, this should be a perfect review but I’m deducting a small percentage of a point for a scratch on my retainer case. 9.75 out of 10 for matching me with the perfect night guard. My teeth grinding pain is gone. That is what I bought it for so mission accomplished. Thank you!

  • Jackie

    I will admit I was nervous to purchase this after looking at the photos of how to take a teeth impression. It looked like it was something I could mess up quite easily. I ordered this because I grind my teeth and I’m now obsessed with Sentinel! I did mess up my impression the first time but it was because I was so nervous and should have waited until I felt comfortable but I went for it and mixed the putty too slowly. It hardened before I could even get it in my mouth! The company mailed me a retry kit free of charge.
    I was going to use this for just nighttime grinding but I use it during the day too. Which I can now say it works well for both day or night. All night guards will damage overtime so I know my double use is shortening its lifespan but with the prices (compared to the dental office) I’ll just buy another one. Love it!

  • Jocelyn R.

    Due to the pandemic, my teeth grinding went from bad already to worse. I’m currently on my 2nd night guard from Sentinel. Ordered my first one back in 2017 and now in May 2021. This is a great value. The product is high quality and a great bang for your buck. Customer service is always outstanding!

  • Gregory Mullen

    Same as dentist. Thank you sentinel team!!

  • Sabrina Collingsworth

    Love this service! I have been ordering mouthguards from Sentinel since 2013 and have never looked back! My dental office was charging me $700 for these hard guards. I’m a bad grinder and go through them quicker than most. Sentinel Mouthguards has great customer service and an even better product.
    Happy to be a faithful customer! I have and will continue to recommend this to friends & family.

    Sabrina C.

  • Jennifer Newsom

    Easier than I thought! I was nervous about using this but the putty process was easy and they include a free putty pack in case you need to redo it (which I did need a 2nd try). I even called the customer service line and had them stay on the phone with me while I took the impression. They were terrific and very helpful. My guard fits beautifully. A+ service!! Will be back.

  • Danny Warner

    Wasn’t to sure about doing this online but the cost difference between my dentist and going online was worth it to find out for me. This worked great! I’m very impressed with Sentinel, they were quick and affordable. Thanks!

  • C. Redding

    After getting a guard through sentinel I now have a slight disdain for my dentist. He tried to charge me $520.00 for the same guard I just got for 135 through sentinel… what a joke. Awesome Price, Awesome Guard!

  • 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

Free Shipping

We ship to you a kit with everything you need from the molding trays and putty, to the prepaid packaging the return it to us.

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.