TL;DR: Retainers hold teeth in their new position after braces or aligners, because teeth can drift back. They are either fixed behind the teeth or removable. The clinician sets how long and how often to wear them. A broken, lost, or tight-fitting retainer needs prompt contact with the practice that made it. This guide has 8 sections and answers 3 frequently asked questions. It lists 5 primary sources, from NHS.uk, bos.org.uk, the GDC and academic.oup.com. Facts were checked on 2026-10-13; it is educational information, not clinical advice.
Educational information only, not clinical advice. Facts are checked against the primary sources listed under Sources (NHS.uk, GDC, CQC and peer-reviewed research), last checked 13 October 2026.
Why are retainers needed?
Retainers are needed because teeth are held by ligaments and bone that keep remodelling after tooth movement. Without support, teeth can shift towards their old positions. The retention phase lets the tissues stabilise. Orthodontic clinicians commonly describe retention as a long-term commitment.
What types of retainer are there?
Three types are common:
- Fixed (bonded) retainer: a thin wire bonded behind the front teeth, worn continuously.
- Vacuum-formed retainer: a clear removable plastic tray, similar to an aligner.
- Hawley retainer: a removable wire-and-acrylic appliance.
Each has trade-offs in visibility, cleaning, durability, and how easily it can be lost or damaged. The clinician recommends one, and some patients use two.
How long should a retainer be worn?
The clinician sets the schedule. Many patients wear removable retainers full-time at first and then move to nights only. Some clinicians advise wearing them indefinitely at night, which is one reason to ask about the plan before treatment starts. Do not stop without asking.
How do I look after a retainer?
General care includes brushing removable retainers gently with a soft brush and cool water, keeping them in their case when not worn, and keeping them away from heat and pets. Hot water can warp plastic. For a fixed retainer, use interdental brushes or floss threaders to clean under the wire.
What if a retainer breaks, is lost, or feels tight?
Contact the practice quickly. A tight retainer can mean teeth have started to move, and continuing to force it on may cause discomfort. A broken fixed wire can irritate the tongue or let teeth shift. Replacement cost depends on the type and provider, so ask what the original quote covered. See braces and Invisalign in Essex.
Where do I find help locally?
Ask the practice that provided your treatment first. If you need a new provider, check registration on the GDC register, and read dentist-led versus specialist orthodontist. You can browse Essex dentists in the Essex directory.
Can a fixed retainer fail without me noticing?
Yes. A removable retainer that no longer fits is obvious. A fixed (bonded) retainer can come away at one end and look unchanged, and teeth can move while you assume it is holding. If you notice a rough edge, a gap or a change in your bite, book a check rather than waiting for your next routine visit.
A 2023 systematic review of fixed (bonded) retainers pooled 34 studies and 3,484 participants (Aye and colleagues, European Journal of Orthodontics). It found that about 35% of fixed retainers failed (breakage, fracture, loosening or bonding failure): about 24% in the short term, 40% in the medium term and 54% in the long term. The review rated the evidence as low quality, and it did not count unwanted tooth movement. Failure is common, which is why a regular check matters.
Monthly retainer self-check
- Does the removable retainer go in without pressure or force?
- Run a fingernail along the fixed wire: any loose section or sharp end?
- Any new gap, overlap or change when you bite together?
If any answer is yes, contact the provider that fitted it. If a wire is cutting your tongue or cheek, contact the practice that day, or NHS 111 out of hours.
Related questions covered elsewhere in this topic: clear aligners.
Directory pages for this topic: orthodontics (braces, Invisalign) in Colchester, orthodontics (braces, Invisalign) in Basildon and orthodontics (braces, Invisalign) in Braintree. Each lists only practices whose own websites mention the treatment; a mention is not proof of availability.
FAQ
Do adults need retainers too?
Yes. Teeth can move at any age, so clinicians commonly advise retainers after adult treatment.
Can I buy a retainer online?
Ask your dentist first. A retainer should fit accurately, and poor fit can cause problems.
Are retainers covered by NHS charges?
For NHS orthodontic treatment, retainers are generally part of the course. Confirm with the provider.
Sources
- NHS.uk, Orthodontics: https://www.nhs.uk/tests-and-treatments/braces/
- British Orthodontic Society: https://bos.org.uk/
- General Dental Council: https://www.gdc-uk.org/
- Aye S T and others (2023), What causes failure of fixed orthodontic retention? European Journal of Orthodontics 45(6): https://academic.oup.com/ejo/article/45/6/645/7310812
- NHS.uk, Braces: https://www.nhs.uk/tests-and-treatments/braces/