Months of Invisalign can come undone if your retainer stops going in, because teeth have a natural tendency to shift back toward where they started. That’s why the American Association of Orthodontists (AAO) says everyone needs a retainer after treatment, whether they had braces or clear aligners, and most people wear one to some degree for life: usually full-time at first, then at night.
Your orthodontist will recommend which retainer suits you and how long to wear it each day. Here’s what the AAO and the research say about the types, the wear schedule, cleaning, and what to do if a retainer stops fitting.
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Why Teeth Move Back After Invisalign
Teeth move because the bone around them remodels, and that process continues for life, so teeth keep moving after treatment ends. Teeth are particularly likely to move back during a “settling in” period right after treatment, while the bone and soft tissue that hold them adjust to their new positions.
The drift back is called relapse. Its causes aren’t fully understood, but a 2023 Cochrane review links it to the fibers that hold teeth in the jawbone pulling back, pressure from the lips, cheeks, and tongue, further growth, and the way the teeth meet. The same review describes relapse as a lifetime risk.
Aligners don’t change this: both braces and aligners move teeth with controlled force, and teeth keep moving after either one. Whether relapse is more or less likely after aligners isn’t settled. A 2024 review found only three studies comparing the two, all at moderate or high risk of bias, and said better-designed studies are needed.
Is Invisalign a Retainer?
No. Aligners move teeth, and a retainer holds them where the aligners put them. As Cleveland Clinic puts it, retainers don’t straighten teeth; braces or aligners do.
The mix-up is understandable, because a clear retainer looks a lot like an aligner: both are transparent plastic trays shaped to your teeth. Align Technology, which makes Invisalign, says its Vivera retainers are made from a more rigid material than its aligners, to hold teeth rather than move them.
When your last aligner comes out, your orthodontist decides when the retainer starts and how you wear it.
The Types of Retainers
There are three main kinds. Removable retainers are either clear plastic or wire (Hawley) retainers, and fixed retainers are bonded in place.
| Type | What it is | Upsides | Downsides |
|---|---|---|---|
| Clear removable (sometimes called Essix) | A transparent plastic tray molded to your teeth | Hard to see, lightweight, and often more comfortable; easy to clean outside the mouth | Heat can damage it; it relies on you remembering to wear it, and it can be lost |
| Hawley (wire) | A wire across the front teeth, attached to an acrylic base that sits against the roof of the mouth or behind the lower front teeth | Removable and easy to clean | The wire is visible |
| Fixed (bonded) | A thin wire bonded to the inside of the front teeth that you can’t take out | Constant support; can’t be lost or forgotten | Makes flossing harder; can still break or come loose |
Vivera is a brand of clear retainer made by Align Technology. The manufacturer says it’s custom-made with the same process as Invisalign aligners.
Which Type Works Better?
No type has been shown to be clearly better. A 2023 Cochrane review of 47 trials with 4,377 people rated the evidence low to very low certainty and couldn’t recommend one approach to retention over another, and a 2026 review comparing fixed, clear, and Hawley retainers found no clear winner either. One caveat: the Cochrane review only included people treated with braces, not aligners. Choosing between clear, wire, and fixed is a conversation to have with your orthodontist.
How Long Do You Wear a Retainer After Invisalign?
Usually full-time at first, then at night, long term. Right after treatment, your orthodontist may ask you to wear it full-time except when eating, drinking, or brushing. After a few months, wear is usually cut back to nights. Cleveland Clinic’s guidance is full-time for at least four to six months, then nights for life; the AAO says the exact hours depend on your orthodontist’s advice and the stage you’re at after treatment.
You’ll get a prescription for retainer wear that says when and for how long. Stick to it: if you don’t, your teeth can move so much that the retainer no longer fits.
The research doesn’t settle the exact hours. There’s no recognized standard for how long retainers should be worn, and a review of three trials found full-time wear of clear retainers was no better than part-time over 6 to 12 months. That’s a reason to follow your own orthodontist’s schedule, not to invent a lighter one.
Do You Have to Wear It Forever?
Probably, to some degree. The AAO says most people will need retainers for the rest of their lives, although wear often becomes less frequent over time as your orthodontist judges how stable your teeth are. Research cited in the Cochrane review found that people who stopped after one to two years risked long-term relapse, which is why some clinicians prefer to keep patients in retainers for longer, sometimes indefinitely.
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Finishing Invisalign?
Ask Dr. Sohrabi, our orthodontist, which retainer suits you and how long to wear it.
How to Clean and Care for Your Retainer
A retainer that isn’t cleaned collects bacteria, which can cause bad breath, gum disease, and cavities, and one that’s poorly looked after can warp or crack and need replacing early. The basics, from the AAO and Cleveland Clinic:
- Rinse it in lukewarm water every time it comes out.
- Brush it gently every day with a soft toothbrush and water or mild soap. Ask your orthodontist before using toothpaste: some toothpastes are harsh enough to scratch or damage a retainer.
- Keep it away from heat. Never use hot or boiling water, and don’t leave it near a heater, a stove, or in a hot car. Heat can warp the plastic and change the fit.
- Skip bleach, alcohol, and ordinary mouthwash, which can damage or discolor it. Ask your orthodontist which cleaning products are safe.
- Brush and floss your teeth before putting it back in.
- Take it out to eat, and don’t chew gum with it in. While you’re wearing a clear retainer, stick to water; the AAO advises against coffee, tea, wine, soda, and juice.
- Keep it in its case whenever it’s out of your mouth. Don’t wrap it in a napkin or drop it loose into a pocket or bag.
- Keep it away from pets, especially dogs, along with its case.
- Take it out for contact sports.
With a fixed retainer, clean between the wire and your teeth every day. Floss threaders, small interdental brushes, or a water flosser make it easier. Plaque that builds up around the wire can contribute to decay and gum inflammation over time.
Questions about retainers after Invisalign? Call our Everett dental office.
If Your Retainer Feels Tight, Breaks, or Gets Lost
- It feels tight. Your teeth may have shifted slightly. The AAO lists natural changes in your mouth, skipped wear, and warping from poor care as possible reasons. Don’t force a retainer that doesn’t fit or that hurts. Contact your orthodontist; if it no longer fits, it will need adjusting or replacing.
- It’s cracked or a wire is loose. Stop wearing it, wear your backup if you have one, and ask your orthodontist about repair or replacement. A broken retainer can poke and irritate your gums or lips. The same goes if a pet chews it.
- A fixed retainer comes loose or breaks. Tell your orthodontist promptly, because teeth can start to shift.
- It’s lost. Contact your orthodontist right away. Without a retainer, your teeth are much more likely to shift back.
Retainers also wear out or stop fitting as snugly over time, so have your orthodontist check yours if the fit changes.
What Affects the Cost of a Retainer
The first set of retainers is often included in the overall orthodontic fee, and replacement retainers may be a separate fee. Insurance coverage for retainers varies widely, so check with your plan. Looking after your retainer is also the simplest way to avoid paying for a replacement sooner than you planned.
Icon Dental Center is in network with Delta Dental/WDS, Regence, Premera, Aetna, and Cigna.
Keeping Your Result in Everett
At Icon Dental Center, our board-certified orthodontist, Dr. Keyvan Sohrabi, plans and delivers all orthodontic treatment, including Invisalign in Everett, in the same practice as our general dentists. If you’re considering aligners or nearing the end of treatment, ask him which retainer suits your case and how long you’ll need to wear it.
Common Questions About Retainers After Invisalign
What happens if you stop wearing your retainer?
Your teeth are much more likely to shift back toward where they started, and they can move enough that the retainer no longer fits. If that happens, don’t force it; contact your orthodontist.
How long do Invisalign retainers last?
There’s no reliable figure. Retainers wear out or stop fitting as snugly over time, and the Cochrane review notes that how long they last hasn’t been well studied. Keeping a retainer clean and in its case helps it last longer.
Are permanent retainers really permanent?
Not in the sense of never needing attention. A fixed retainer is bonded to the inside of your teeth so you can’t take it out, but it can still break or come loose. A 2023 systematic review found about a third of bonded retainers failed at some point, though the evidence was low quality.