Custom Hard Night Guard for Teeth Grinding and Clenching


Defend Your Teeth From the Daily Grind

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. We understand the frustration and discomfort that come with this common problem, and that’s why we’ve designed a night guard that’s both effective and comfortable to wear.

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.

In just 3 easy steps!

three easy steps for custom made night guard

At Sentinel Mouthguards, we’re committed to providing our customers with the best possible products and service. Our team of dental professionals has years of experience in helping patients find relief from teeth grinding and clenching, and we’ve used that expertise to create a night guard that’s both effective and affordable. Trust us to be your partner in oral health and start enjoying a more peaceful, pain-free night’s sleep today.

  • 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! 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 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

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

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 Extreme Hard Custom Night Guard

which mouth guard is right for you? Take our free quiz
Not sure which night guard is the best fit for your needs? Take our quick 60-second quiz and find out! Our quiz is designed to help you identify the right mouthguard for your unique dental profile and specific concerns. With just a few simple questions, you’ll receive personalized recommendations tailored to your needs and preferences.

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.
  • 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.

sentinel mouthguards flat teeth from grinding graphic


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

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.

Do you need your custom mouth guard as soon as possible? You can speed up the process by selecting the expedited shipping option during checkout. This option includes all-inclusive USPS Priority Shipping and a quick turnaround time of just two business days, so you can receive your mouth guard sooner and start enjoying the benefits of superior protection and comfort.




Additional Information

Weight3 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.