Editor’s Note: This article was updated on September 1, 2025 to ensure the information is accurate, comprehensive, and aligned with the latest guidance on dental retainers.
Dogs love chewing them, they get misplaced during travel, or they simply wear out over time — no matter how careful you are, needing a replacement retainer is almost inevitable.
If you’ve found yourself without a working retainer, you’re not alone. Replacing retainers is a normal part of post-orthodontic care, and the key is acting quickly before your teeth start shifting.
At Sentinel Mouthguards, we make reordering simple and stress-free. If we already have your impression on file, you can get a fresh set shipped straight from our U.S. dental lab without another trip to the orthodontist.
👉 For the bigger picture on why retainers matter and how they fit into long-term orthodontic care, check out our [Complete Guide to Dental Retainers].
Why Retainers Need to Be Replaced
Even with the best care, no retainer lasts forever. Clear retainers in particular are made from thin, medical-grade plastic designed to hold your teeth in place — not to withstand years of wear and tear. Over time, daily use naturally leads to:
-
Cracks or Chips → Small fractures weaken the appliance and can harbor bacteria.
-
Warping → Heat exposure (like leaving it in a hot car) or grinding habits can distort the fit.
-
Loose Fit → If your retainer no longer “snaps” into place, it may not be keeping your teeth stable.
-
Stains or Odor → Even with proper cleaning, discoloration and odors can build up after months of use.
Most orthodontists recommend replacing clear retainers every 6–18 months depending on wear, while traditional Hawley retainers may last several years. If you’re wearing a bonded retainer, occasional repairs may still be needed when the wire comes loose.
👉 Want a deeper dive into how long different retainers last? Check out our [How Long Do Dental Retainers Last?].
💚 At Sentinel, we keep your impressions on file digitally making future reorders easier than every.
Signs You Need a New Retainer
Wondering if it’s time for a replacement? Here are the red flags to watch for:
✅ Cracks or chips — even small ones weaken the appliance and trap bacteria.
✅ Loose fit — if it doesn’t “snap” in snugly, your teeth may already be shifting.
✅ Warping or misshaping — often caused by heat or teeth grinding.
✅ Persistent odors or yellowing — deep stains or smells that won’t go away after cleaning.
✅ Discomfort — rubbing, sore spots, or irritation that wasn’t there before.
✅ It’s been more than 1–2 years — most clear retainers naturally wear out within this timeframe.
💚 Pro tip: If you’ve lost your retainer or your dog chewed it (a very common problem!), don’t wait — teeth can start shifting in just a few weeks. Sentinel makes it easy to reorder from impressions already on file.
How to Replace Your Retainer with Sentinel (Fast & Affordable)
Losing or breaking a retainer doesn’t mean another expensive trip to the orthodontist. At Sentinel, we make the process simple, affordable, and stress-free.
Here’s how it works:
-
We keep your impressions on file 🗂️
Already a Sentinel customer? Great news — we store your dental impressions digitally. That means you can reorder a new retainer without having to take another impression (unless your teeth have shifted). -
Easy online ordering 💻
Just log on, choose your replacement option, and place your order. No appointments, no waiting rooms, no hidden fees. -
Crafted in our U.S. dental lab 🦷
Your replacement is made with the same FDA-approved, dentist-grade materials used in orthodontic offices — at a fraction of the price. -
Delivered to your door 📦
Most replacements ship within days, so you can get back to protecting your smile quickly.
💚 Pro Tip: If you're a new customer and need to take a fresh dental impression, no worries! We'll send your impression kit with instructions to ensure your new retainer fits perfectly.
👉 Related: [Complete Guide to Dental Retainers]
Frequently Asked Questions About Replacement Retainers
Can I use these if I have a permanent retainer?
Yes! As long as your permanent retainer is securely bonded and not loose, you can still wear a clear Essix-style retainer over it. The retainer will fit comfortably on top, providing added protection and stability.
How quickly will my teeth start to shift without a retainer?
Your teeth are most vulnerable right after orthodontic treatment. Shifting can begin in just a few weeks if you don’t wear your retainer as instructed. That’s why consistent wear — exactly as recommended by your orthodontist — is so important for keeping your results intact.
What is an Essix Plus Dental Retainer? Why choose it?
The Essix Plus retainer is made from a stronger, more durable material than standard Essix retainers. It’s designed to withstand clenching and grinding forces while still keeping your teeth aligned. If you grind your teeth at night or want a retainer that lasts longer, Essix Plus is the smarter choice.
Are Sentinel retainers made in the USA?
Yes. Every retainer is crafted in our U.S. dental lab using dentist-grade materials. No outsourcing — just professional quality you can trust.
What if I don’t take my impression correctly?
Don’t worry — we’ve got you covered. Each kit includes an extra set of putty for a second try. If you still need more, we’ll send you another impression kit free of charge. Plus, our team is here to help: you can watch step-by-step video tutorials, follow our written instructions, or chat with our live support team for guidance. Our goal is to make sure you get a perfect impression for the best-fitting retainer possible.
Final Thoughts: Don’t Wait to Replace Your Retainer
Retainers are the key to keeping your orthodontic results locked in place — but they don’t last forever. Whether yours has cracked, stretched out, developed an odor that won’t go away, or simply disappeared (dogs love them!), replacing it quickly is the best way to prevent shifting and protect your smile.
The good news? Getting a new retainer doesn’t have to cost $300+ at the orthodontist. With Sentinel, you’ll get the same dentist-grade quality, FDA-approved materials, and precise fit — for a fraction of the price. And with impressions kept on file for one year, reordering is quick and hassle-free.
💚 Ready to protect your smile for the long run? [Order your replacement retainer today] and enjoy peace of mind knowing your teeth will stay exactly where your orthodontist left them.
Have more questions? Contact us at info@sentinelmouthguards.com or chat with a live representative Mon-Fri 9am-5pm Eastern