Braces come off. Aligners finish. Your teeth are straight. Treatment is over. Except it is not. Without a retainer, your teeth will move. Not might move. Will move.
Retention is the final stage of orthodontic treatment, and in many ways it is the most important one. Everything the braces or aligners achieved over months of treatment can be undone in a matter of weeks without proper retention. Here is what you need to know.
Why teeth move after orthodontic treatment
Teeth are not set in concrete. They sit in bone, surrounded by a web of fibres called the periodontal ligament. During orthodontic treatment, controlled forces are applied to move teeth through bone. The bone remodels around the teeth in their new positions, but this remodelling takes time to stabilise.
In the months immediately after treatment, the bone and fibres around the teeth are still reorganising. The teeth are in their new positions, but they are not fully settled. Without something holding them in place, the natural tension in the periodontal fibres can pull the teeth back towards their original positions. This is called orthodontic relapse.
Beyond the immediate post-treatment period, teeth continue to shift gradually throughout life as part of normal ageing. This is called late physiological drift and affects everyone, whether or not they have had orthodontic treatment. A retainer counteracts both types of movement.
Types of retainers
There are three main types used in Brisbane, each with its own advantages.
Essix retainers (clear retainers)
These are thin, transparent plastic trays that fit snugly over your teeth. They look similar to a clear aligner tray. Essix retainers are the most popular choice for patients who have completed clear aligner treatment, partly because the wear experience is familiar.
Advantages: Discreet, comfortable, relatively inexpensive to replace.
Considerations: They can crack or warp over time, particularly if exposed to heat. They do not allow the upper and lower teeth to settle into full contact with each other (the plastic sits between them). They need to be removed for eating and drinking anything other than water.
Hawley retainers
A Hawley retainer has an acrylic plate that sits against the roof of the mouth (or behind the lower teeth) with a metal wire that holds the front teeth in position. It is the traditional retainer design that has been in use for decades.
Advantages: Adjustable (your dentist can tighten or modify it), durable, allows the teeth to settle into natural contact because the wire only holds the front teeth.
Considerations: More visible due to the metal wire across the front teeth. Can feel bulky initially. Takes some patients a few days to adjust to speaking clearly with it in.
Bonded (fixed) wire retainers
A thin wire is bonded to the back surfaces of the front teeth (usually the lower six teeth, sometimes the upper teeth as well). It stays in place permanently and provides constant retention without requiring you to remember to wear anything.
Advantages: Always working. No compliance required. Invisible from the front.
Considerations: Requires careful cleaning around the wire (flossing with a threader or using an interdental brush). The wire can debond or break, requiring repair. If it breaks without you noticing, teeth can shift before the issue is identified.
Many patients use a combination: a bonded wire on the lower teeth for constant retention, and a removable retainer (Essix or Hawley) on the upper teeth for night-time wear.
How long to wear your retainer
The first three to six months
Wear your removable retainer full-time (20 to 22 hours a day), removing it only for eating, drinking, and cleaning. This is the highest-risk period for relapse, because the bone and soft tissue are still stabilising around the new tooth positions.
Six to twelve months
Most patients can transition to night-time wear only (eight to ten hours). Your dentist or orthodontist will assess your progress and advise when this transition is appropriate.
Beyond twelve months
Night-time wear is recommended indefinitely. This is the recommendation that many patients find surprising, but it reflects the reality that teeth continue to shift throughout life. Wearing a retainer at night is a small effort to protect the investment you made in straightening your teeth.
If you find that your retainer feels tight when you put it in after a night of not wearing it, that means your teeth are moving during the time it is out. Continue wearing it.
Bonded wire retainers
If you have a bonded retainer, it works continuously and does not require a wearing schedule. However, it needs to be checked at your regular dental appointments to ensure the wire is intact and the bond is secure. If the bonded retainer is your only retention, a wire break that goes unnoticed can lead to shifting.
What happens when you skip your retainer
Skipping a night here and there is unlikely to cause noticeable movement. But extended breaks create real risk.
A few days without: Minor tightness when you put the retainer back in, indicating slight movement.
A few weeks without: More noticeable tightness. The retainer may be uncomfortable. Teeth may have shifted enough that the retainer no longer seats fully.
A few months without: Visible movement is possible, particularly in the lower front teeth and upper lateral incisors. The retainer may no longer fit.
A year or more without: Significant relapse may have occurred. At this point, the retainer cannot push the teeth back. A new course of aligner treatment may be needed, followed by a new retainer.
The cost of disciplined retainer wear is a few minutes a day. The cost of relapse is months of re-treatment and thousands of dollars.
Caring for your retainer
Removable retainers (Essix and Hawley)
- Rinse with cool water every time you remove them.
- Clean daily with a soft toothbrush and clear liquid soap. Avoid toothpaste, which can scratch clear retainers.
- Store in the retainer case when not in your mouth. Never wrap in a napkin.
- Keep away from heat. Do not leave in a hot car, in direct sunlight, or near hot water.
- Soak weekly in a retainer cleaning tablet or a solution of one part white vinegar to three parts water.
For more detailed cleaning guidance, see our guide on retainer care.
Bonded wire retainers
- Use floss threaders, superfloss, or interdental brushes to clean around and under the wire daily.
- Ask your dental hygienist to clean around the wire during your regular professional cleaning appointments.
- Report any looseness, breakage, or sharp edges promptly.
When to replace your retainer
Removable retainers do not last forever.
Essix (clear) retainers typically last one to three years with regular use, depending on how well they are cared for and whether you grind your teeth. Signs of wear include cracks, holes, discolouration, and loss of rigidity.
Hawley retainers can last five years or more if maintained. The acrylic can be relined and the wire adjusted.
If your retainer is damaged, lost, or no longer fits, see our retainer replacement guide for costs and options. Do not delay. The longer you go without retention, the more your teeth may shift.
Retainers as part of the bigger picture
Orthodontic treatment is an investment of time, effort, and money. Clear aligner treatment at Ivy Dental starts from $6,500. A retainer that costs a fraction of that amount protects the result for years. Skipping retention is the most common reason patients need retreatment, and it is the most preventable.
At Ivy Dental in Everton Park and Nundah, retention planning is built into every orthodontic case. We fit retainers, monitor retention at follow-up appointments, and provide replacements when needed.
If you have finished orthodontic treatment and need a retainer, or if your retainer has broken and your teeth are starting to shift, call us.
Book a retention appointment at Ivy Dental. Call (07) 3266 7120 or visit our contact page.
Indicative pricing. Your quote may differ based on clinical assessment.
