You have spent months - possibly years - straightening your teeth with braces or aligners. Then your retainer cracks, gets thrown out with a lunch tray, or disappears. If it has happened to you, the most important thing is: do not wait to address it.
This guide covers why retainers matter, what happens without one, replacement costs, retainer types, and care tips.
Why retainers matter more than most people realise
Once braces or aligners come off, teeth have a natural tendency to shift back toward their original positions. This is called orthodontic relapse, and it happens because the bone and ligaments around your teeth need time to stabilise.
A retainer holds your teeth in their corrected positions while this stabilisation occurs. Without it, movement can begin within days - and in some cases, noticeable shifting can occur within just a few weeks.
The degree of relapse varies from person to person and depends on factors like:
- How much your teeth were moved during treatment
- Your age - younger patients may experience more post-treatment movement
- The type of orthodontic issue that was corrected (rotations and gaps tend to relapse more readily)
- How consistently you wear your retainer during the critical first 12 months
The straightening phase is only half the job. Retention is what helps preserve the result.
What happens if you stop wearing your retainer?
The short answer: your teeth may move. The longer answer depends on how long you go without it.
First few days to two weeks
Minor shifting may occur, but it is often not visible to the eye. Your retainer may feel slightly tight when you put it back in, which indicates that some movement has already started. In most cases, resuming consistent wear at this stage can guide teeth back into position.
Two to six weeks
More noticeable movement is possible, particularly in the front teeth. If your old retainer still fits - even if it is tight - wearing it may help limit further shifting. However, if it no longer seats properly or causes pain, do not force it. See your dentist for an assessment.
Several months or longer
Significant relapse may have occurred. At this point, a new retainer alone may not be enough to correct the movement. Your dentist may recommend a short course of aligner treatment or other intervention to re-align your teeth before fitting a new retainer. See our aligner cost guide for pricing information.
If you have lost your retainer, the sooner you act the better. Even a few days can make a difference in how much movement occurs.
Types of retainers
Not all retainers are the same. Understanding the differences can help you have a more informed conversation with your dentist about which type suits your situation.
Essix retainers (clear)
These are the most common removable retainer. They look similar to clear aligners: thin, transparent plastic trays that fit snugly over your teeth.
Pros: Nearly invisible, comfortable, easy to clean Cons: Can crack or warp over time, may need replacing every 1 to 3 years with regular wear, not suitable if you grind your teeth heavily
Hawley retainers
The traditional design uses acrylic against the roof of your mouth or behind your lower teeth, plus a metal wire that holds the front teeth in position. These can be adjusted if minor tooth movement occurs.
Pros: Durable, adjustable, long-lasting Cons: More visible due to the metal wire, can feel bulkier, may affect speech initially
Bonded (fixed) wire retainers
A thin wire bonded to the back surfaces of your front teeth, typically the lower six. These work passively because they stay in place.
Pros: No compliance required, invisible from the front, continuous retention Cons: Can make flossing more difficult (a floss threader or interdental brush is needed), wire can debond or break, requires professional removal
Many patients use a combination - for example, a bonded wire on the lower teeth and a removable Essix retainer on the upper teeth. Your dentist can recommend the most appropriate option based on your treatment history and lifestyle.
Book a retainer assessment at Ivy Dental
How quickly should you replace a lost or broken retainer?
Ideally within one to two weeks. The longer you go without a retainer, the more opportunity your teeth have to shift. If you are still within the first 12 months after completing orthodontic treatment, urgency is particularly important - this is the period when teeth are most prone to relapse.
Here is what to do:
- Contact your dentist or orthodontist promptly. Let them know your retainer is lost or broken and ask how soon you can be seen.
- If your retainer is cracked but still fits, you may be able to continue wearing it temporarily until your replacement is ready. Ask your dentist whether this is advisable in your case.
- Bring any broken pieces to your appointment. In some cases, a retainer can be repaired rather than fully replaced.
- Do not attempt DIY repairs. Superglue and household adhesives are not safe for use in the mouth and can damage both the retainer and your teeth.
Can old aligners work as a temporary retainer?
If you completed treatment with clear aligners and still have your final set of trays, they may serve as a short-term substitute while you wait for a replacement retainer.
However, this is a temporary measure, not a long-term solution. Aligner trays are not manufactured to the same durability standard as dedicated retainers. If you plan to use a final aligner tray as a stopgap, let your dentist know so they can confirm it is appropriate for your situation.
How much does a replacement retainer cost?
Retainer replacement costs vary depending on the type and the complexity of your case. As a general guide for Brisbane:
Retainer type | Replacement cost |
|---|---|
Essix (clear) retainer | From $200 per arch |
Hawley retainer | From $250 per arch |
Bonded wire repair | From $150 (repair) to from $300 (full replacement) |
These are starting prices and may vary depending on whether new impressions or digital scans are required, whether both arches need replacing, and any clinical factors specific to your situation. Your dentist can provide a personalised quote after an assessment.
Some health funds may provide a partial rebate for retainer replacement under orthodontic or general dental cover. Check with your fund directly, as coverage varies between policies.
How to care for your retainer so it lasts
Good habits can extend the life of your retainer and reduce the likelihood of needing an early replacement.
For removable retainers (Essix and Hawley)
- Clean it daily. Rinse your retainer under lukewarm water each time you remove it. Brush it gently with a soft toothbrush - no toothpaste, as the abrasives can scratch the surface. Use a retainer cleaning tablet or mild soap once a week for a deeper clean.
- Store it in its case. The most common way retainers get lost or broken is by being wrapped in a napkin (then thrown away) or left loose in a bag. Always use the hard case provided by your dentist.
- Keep it away from heat. Do not leave your retainer in a hot car, near a heater, or in boiling water. Heat can warp the plastic and affect the fit.
- Remove it for eating and drinking (except water). Food and hot drinks can damage or stain the retainer.
- Bring it to your dental appointments. Your dentist can check the fit and condition as part of your regular check-up.
For bonded wire retainers
- Floss carefully around the wire using a floss threader, interdental brush, or water flosser. Plaque can accumulate around the bonded sections if not cleaned properly.
- Avoid biting into very hard foods directly with the bonded teeth - this can dislodge the wire.
- Check regularly by running your tongue along the wire. If it feels loose, sharp, or detached from any tooth, see your dentist for a repair.
When to see your dentist
Contact your dentist if:
- Your retainer is lost, broken, or no longer fits
- You notice your teeth have started to shift
- Your bonded wire feels loose or detached
- You are unsure whether you still need to wear your retainer (the answer is usually yes)
At Ivy Dental, we can assess your retainer needs, take new impressions or digital scans if required, and have a replacement retainer fabricated within one to two weeks.
Book a retainer replacement appointment at Ivy Dental | Call (07) 3266 7120
Visit our Brisbane clinics page for hours and directions. If you are considering whether to address crooked teeth that have relapsed, a consultation can help determine whether re-treatment with aligners or an alternative approach like veneers is more appropriate.
Retainer costs and treatment timelines may vary depending on individual clinical circumstances. Your dentist will provide a personalised recommendation after assessment.
