The Sentinel Promise: Perfect fit or we remake it free.
A broken night guard doesn't always mean an emergency. Learn what causes night guards to crack, whether they're safe to wear, and when it's time for a replacement.
Waking with a sore or nicked tongue? You’re not alone. This pillar guide explains why you’re biting your tongue in your sleep—from bruxism and airway issues to stress and medications—and exactly how to stop it. Get quick relief for active sores, proven prevention tips, and guidance on when to see a pro. We also compare guard options (including our Tongue & Cheek Biting Relief Guard) so you can sleep comfortably and protect your mouth.
Waking up with jaw soreness, headaches, or worn-down teeth? You may be grinding your teeth at night — a condition known as bruxism. Updated October 26th, 2025, this guide will help you identify the signs, understand the causes, and explore solutions like night guards to protect your teeth and improve your sleep.
Hot or cold giving you that sharp “zing”? Sensitivity usually points to exposed dentin from grinding, acid erosion, gum recession, or a crack. Learn the fixes—custom guards, desensitizing toothpaste, and when to see your dentist.
Trying to decide between an upper or lower night guard? This guide breaks down the key differences in comfort, fit, and effectiveness so you can choose the right guard for your sleep style and jaw. Learn when each type works best—and why a custom fit matters more than the arch you choose.