The Sentinel Promise: Perfect fit or we remake it free.
Not all night guards are created equal — and some contain materials that may trigger irritation or allergic reactions. Common culprits like MMA (methyl methacrylate), PVC, and latex can cause redness, swelling, or discomfort in sensitive individuals. At Sentinel Mouthguards, we take the guesswork out of safety. Our custom night guards are crafted from dental-grade EVA and copolyester — completely free from MMA, PVC, latex, phthalates, and silicone — so you can protect your smile with total confidence.
Have you noticed that your favorite custom night guard brands have suddenly disappeared from Amazon? You’re not alone. In recent months, Amazon has restricted many reputable U.S. dental labs while allowing cheaper, overseas alternatives to remain. In this article, we explain what happened, why some of the best custom night guards are no longer available on Amazon, and how you can still get a safe, FDA-compliant guard directly from a trusted U.S. lab.
At Sentinel Mouthguards, we’ve reviewed more than 5,000 dental impressions — and the same mistakes keep showing up. From shallow molars to putty timing errors, even small slip-ups can lead to a poorly fitting guard. In this guide, we break down the most common impression mistakes (with real examples) and show you how to avoid them for a perfect fit every time.
Not sure if your night guard fits the way it should? In this guide, we break down exactly how a properly fitting night guard should feel — from snugness to comfort to bite alignment. Learn what’s normal, what’s not, and when it’s time to reach out for an adjustment.
Think your custom night guard is made in the USA? Think again. Many online companies ship impression kits from U.S. addresses—but once they receive your mold, they scan it and outsource production to overseas manufacturers. The result? A night guard made in China, not America. In this article, we uncover how these misleading practices work and why choosing a truly U.S.-made night guard from Sentinel Mouthguards is the safer, smarter choice.
Your night guard protects your teeth — but only if it’s clean. This guide covers daily cleaning, weekly deep cleaning, and sterilization methods, plus what NOT to do.
