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.
Tongue biting during sleep may be linked to teeth grinding, involuntary jaw movement, sleep disorders, medications, or neurological conditions. Learn what signs to watch for, when to seek professional care, and how a custom upper-and-lower guard set can help protect the tongue and inner cheeks.
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 tooth sensitivity often happens when worn enamel, receding gums or another dental issue exposes the dentin beneath. Learn what different pain patterns may mean, when to see a dentist and how to safely reduce sensitivity.
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.