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

  • Tori Allen

    I love this mouth guard because it is perfectly fit to my teeth. It feels great & not bulky at all. Love your service guys!

  • A. Bushman

    I’d been using the standard night guard (purchased at CVS) but had trouble sleeping throughout the night. The store bought guard was soft & loose fitted. I was considering a high dollar night guard from my dentist when I read a thread on Reddit about Sentinel and the DIY impression system. So, I bought a kit and gave it a try using the putty and trays provided. Easy. Took a great mold of my teeth and got a great fitting, comfortable night guard. Since then, my wife and sister have both bought their own. Lucky to have stumbled across such a money saving alternative.

  • Sammy U.

    Fantastic experience with a company that is on their game. Smooth, quick process. Even got a couple of night guard cleaning tablets in my package. Would highly recommend!

  • Fabian Morais

    I really like these night guards. I do not like soft floppy guards. They always seem to move around in the mouth and stretch out over time. These are hard and actually snap on to my teeth. The edges are smooth and not rough to the tongue or gums. This is my second guard from Sentinel and I ordered the 2mm. I would order more.

  • Emily Hill

    My nighttime grinding has not stopped ( I guess until there’s a cure this is as good as it gets) but I am at least grinding away on some durable material instead of my teeth. I have noticed my jaw & facial pain has stopped & I am grateful for the two year warranty on these.

  • John

    No complaints here. Price was righteous and works well even a year later. Looks professional/high quality and beats dental guards you’d pick up from a retailer like Walmart & CVS. Seriously, why buy junk like that when you can wait three weeks and get something fantastic that is fitted to your teeth and actually works!

  • Michael Massey

    Thank you for your responsiveness and great service. Greatly appreciated:)
    -M. Massey

  • Patricia K.

    Just wanted to let you know I love my mouthguard. Thanks so much! -Patty

  • Kai’Lyn Parinello

    I received my hard dental night guard & after two nights use I thought maybe I should have chosen the dual laminated guard. Contacted Sentinel & they happily complied with my request to change. By the time I received my new dual laminated night guard I had really adapted to my hard guard & decided to keep it after all (returned the dual laminated one). They were great through the process and went above and beyond to make a night guard that works for me. Highly recommended!

  • Tinnia R.

    Customer service is on point! Well done Sentinel!!!

  • C. Washington

    Snaps in place. Perfect fit! Thanks SM Team!

  • Richard M.

    By far, the most comfortable night guards on the market. These guys take pride in their work and will work with you to your absolute satisfaction. A+++++

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.