Why is retention needed?
As teeth move during orthodontic treatment, the fibres that attach the teeth to the bone and the gum tissues are also reorganised. It takes months for these tissues to adapt to the new position; during this time the teeth tend to move back. In addition, the position of the teeth keeps changing somewhat throughout life with age. Retainers limit these changes and keep the treatment result.
Types of retainer
Removable clear retainers
Thin, aligner-like trays made to the final position of the teeth. Because they are removable, they are easy to clean. They are usually worn full-time in the first period after treatment and then at night. Over time they can wear or crack and may need replacing at intervals.
Fixed retainer wire
A thin wire bonded to the back of the front teeth. It is not visible from outside and does not depend on the patient remembering to wear it. Because tartar can build up around the wire, careful cleaning with a floss threader or interdental brush is needed. A fixed wire is often used together with a removable retainer.
Removable wire retainers
Classic retainers made of an acrylic body and wire components. They may be preferred in some cases.
| Type | Appearance | Wear requirement | Care |
|---|---|---|---|
| Clear retainer | Clear | Must be worn | Lukewarm water and a soft brush |
| Fixed retainer wire | Not visible from outside | No wear needed | Floss threader, interdental brush |
| Removable wire retainer | Wire visible on the front teeth | Must be worn | Brushing, store in its case |
How long is it worn?
The duration and wear schedule for retention are set by the orthodontist. A common approach is full-time wear for a while after treatment, followed by long-term night-time wear. Because tooth position can change throughout life, many orthodontists recommend wearing retainers at night indefinitely.
Caring for your retainer
- Clean removable retainers with lukewarm water and a soft brush; do not use hot water.
- Always keep them in their case when not in use.
- Clean around a fixed wire every day, and have regular dental check-ups to prevent tartar build-up.
- If you notice a crack, distortion or fit problem, contact the clinic.
If your retainer breaks or is lost
Contact the clinic promptly. Teeth can shift quickly when a retainer is not worn, especially in the first months after treatment. If one end of a fixed wire has come loose, do not try to bend it yourself. Our related article: Why replacing a broken retainer matters.
What can be done if teeth have shifted?
If teeth have shifted because a retainer was not worn, depending on the amount of movement, small corrections with a new retainer or a short course of clear aligner treatment can be planned. The assessment is made at an examination. Details: Do teeth shift again after braces come off?