---
title: "Permanent (Bonded) Retainer: Pros, Cons and Cost"
description: "Permanent bonded retainers explained: how they are fitted, pros and cons against removable retainers, cleaning, lifespan, repairs and 2026 London prices."
canonical: https://orthodontistslondon.com/guides/permanent-retainer
last_updated: 2026-10-08
---

# Permanent (Bonded) Retainer: Pros, Cons and Cost

Updated 21 October 2026. By Orthodontists London.

Short answer

## Is a permanent retainer worth it?

For most people who have had braces or aligners, yes. A bonded wire behind the front teeth holds them 24 hours a day without relying on you to wear anything, which is why it is often paired with a removable night-time retainer. The trade-off is extra cleaning and occasional repairs.

A permanent retainer, also called a bonded, fixed or lingual retainer, is a thin wire glued to the back of your front teeth after orthodontic treatment. It cannot be seen when you smile, it does not come out, and it works all day and night. Because teeth naturally keep shifting throughout life, and lower front teeth in particular tend to crowd with age, many orthodontists now fit a bonded wire as standard and add a clear removable retainer as a backup.

| Feature | Bonded (permanent) retainer | Removable clear retainer |
| --- | --- | --- |
| Visibility | Hidden behind teeth | Nearly invisible |
| Relies on you to wear it | No | Yes, usually nightly |
| Cleaning | Needs floss threaders or interdental brushes | Easy; brush the tray |
| Common problems | Loose bonds, tartar build-up | Cracks, loss, warping |
| Typical London price | £250–£300 per arch; £450–£500 upper and lower | £110–£145 per arch |
| Lifespan | Many years with checks | 1–3 years |

## How is a permanent retainer fitted?

Fitting takes about 20 to 40 minutes and is usually done on the day your braces come off or at your final aligner appointment.

1. The backs of the front teeth are cleaned and polished.

2. A mild gel prepares the enamel for bonding.

3. A wire, either custom-bent or made from a digital scan, is placed behind the teeth.

4. Tooth-coloured composite is applied to each tooth and set with a light.

5. The bite is checked to make sure the upper teeth do not hit the wire.

No injections are needed. Most retainers run from canine to canine (six teeth) on the lower arch, and on the upper arch they are often fitted to the four or six front teeth, depending on the bite.

Compare typical fees for every treatment, in central and outer London, in our [London Invisalign and braces price index](https://orthodontistslondon.com/tools/london-invisalign-braces-price-index).

## Pros of a permanent retainer

- **No compliance needed**: it works even if you forget your night-time retainer.

- **Invisible**: nobody can see it from the front.

- **Good for high-risk cases**: closed gaps, rotated teeth and lower crowding are particularly prone to relapse.

- **Long-lasting**: a well-maintained wire can last for many years.

## Cons of a permanent retainer

- **Harder to clean**: plaque and tartar collect around the wire, especially on the lower teeth.

- **Bonds can fail**: a loose bond means that tooth is no longer held and can move.

- **Wire can distort**: a bent or active wire can move teeth in unplanned ways, so it needs checking.

- **Upper wires and the bite**: on some bites there is not enough room for an upper wire.

For that reason most practices recommend a combination: bonded wire plus a removable retainer at night, at least for the first year or two. Our [retainer costs](https://orthodontistslondon.com/guides/retainer-cost) guide explains all retainer types and prices, and [Essix vs Hawley retainers](https://orthodontistslondon.com/guides/essix-vs-hawley-retainer) compares the removable options.

## How do you clean a permanent retainer?

Good cleaning protects your gums and helps the bonds last.

- **Brush** behind the front teeth carefully, angling the brush towards the wire.

- **Floss under the wire** with a floss threader or superfloss once a day.

- **Interdental brushes** of the right size are often easier than floss.

- **Water flossers** help flush debris but do not replace mechanical cleaning.

- **Dental hygienist visits** every six months or so remove tartar that builds up behind lower teeth.

## What if a permanent retainer comes loose?

You will usually notice a sharp edge with your tongue, a tooth that feels different, or a wire that moves. Do not try to glue it back yourself or bend the wire. Instead:

| What you notice | What to do |
| --- | --- |
| One bond loose, wire intact | Wear your removable retainer and book a repair soon |
| Wire broken | Wear your removable retainer full time and book promptly |
| Wire poking the tongue | Cover with orthodontic wax; book a visit |
| A tooth looks like it has moved | Book as soon as possible; minor relapse is easier to correct early |

Repairs usually cost about £60 to £150 depending on what is needed. If a tooth has already moved, it may need a short course of aligners before rebonding. See [replacement retainers in London](https://orthodontistslondon.com/guides/replacement-retainers-london) for turnaround times and options.

## How much does a permanent retainer cost in London?

In London a bonded retainer typically costs £250 to £300 per arch, or about £450 to £500 for upper and lower, if it is not already included in your orthodontic fee. Many treatment quotes include the first set of retainers and a year of retention reviews, so check yours. Across the UK, prices are similar or slightly lower; [how much braces cost in London and the UK](https://orthodontistslondon.com/guides/braces-cost-london) shows what typical treatment fees include.

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## How long should you keep a permanent retainer?

As long as you want your teeth to stay straight. There is no set date when teeth stop moving. Some people keep their bonded retainer for life with occasional repairs; others have it removed after several years and switch to a removable retainer worn a few nights a week. Your orthodontist will advise based on how your teeth were before treatment.

## Can you get a permanent retainer without having had braces?

Sometimes. A bonded wire can be used to stabilise teeth that have drifted, to hold a gap closed after bonding, or to splint teeth loosened by gum disease, although the last of these is usually managed by a dentist or periodontist. If your teeth have moved since earlier treatment, a short course of aligners followed by a bonded wire is a common route.

## Does a permanent retainer affect eating?

Day to day, most people forget it is there. It helps to avoid biting very hard foods directly with the front teeth, such as crusty baguettes, apples straight from the fruit, ice and hard sweets, because heavy forces can break a bond. Cut hard foods into pieces and chew with the back teeth.

## Can a permanent retainer be replaced with a removable one?

Yes. If you find the wire hard to clean or you have had repeated breakages, it can be removed and replaced with a clear retainer, ideally made from a fresh scan on the same day so your teeth are held continuously. You will then need to wear the removable retainer consistently, usually every night at first.

## Upper vs lower permanent retainers

|  | Lower bonded retainer | Upper bonded retainer |
| --- | --- | --- |
| How common | Very common | Common, depends on bite |
| Main reason | Lower front teeth crowd with age | Hold closed gaps and rotations |
| Typical span | Canine to canine | Four to six front teeth |
| Main risk | Tartar build-up | Lower teeth biting on the wire |
| Usually paired with | Night-time clear retainer | Night-time clear retainer |

## How often should a bonded retainer be checked?

Most practices review bonded retainers at regular intervals during the first year after treatment, then at least once a year. Your dentist and hygienist will also look at it at routine check-ups. A check takes a few minutes and catches loose bonds or a distorted wire before teeth move.

## Get your retainer checked or fitted

If you have just finished treatment elsewhere, have a loose wire, or want to know whether a bonded retainer suits you, we can help. [Request a consultation](https://orthodontistslondon.com/#enquire) through our form and mention your retainer in the message.

## Frequently asked questions

### How long does a permanent retainer last?

Many bonded retainers last for years, often a decade or more, with regular checks. Individual bonds can come loose and need repairing.

### Does a permanent retainer hurt?

Fitting is painless and needs no injections. The wire can feel strange against the tongue for a few days.

### Can a permanent retainer be removed?

Yes. An orthodontist or dentist can remove it in one short visit by polishing off the bonding material.

### How do you floss with a permanent retainer?

Use a floss threader or superfloss to pass under the wire between each tooth, or interdental brushes and a water flosser.

### How much is a permanent retainer in London?

Typically £250 to £300 per arch or about £450 to £500 for upper and lower. Repairing a loose bond usually costs £60 to £150.

## Related guides

- [How Much Do Braces Cost in London and the UK? (2026)](https://orthodontistslondon.com/guides/braces-cost-london)
- [Invisalign Cost in the UK and London: 2026 Prices](https://orthodontistslondon.com/guides/invisalign-cost-uk)
- [Lingual Braces in London: Cost, Pros and Cons (2026)](https://orthodontistslondon.com/guides/lingual-braces-london)
- [Is Invisalign Worth It? Pros, Cons and Cost](https://orthodontistslondon.com/guides/is-invisalign-worth-it)
- [Retainer Costs After Braces and Invisalign](https://orthodontistslondon.com/guides/retainer-cost)
- [London Invisalign and Braces Price Index 2026](https://orthodontistslondon.com/tools/london-invisalign-braces-price-index)
- [Orthodontists in London: Invisalign and braces](https://orthodontistslondon.com/)
- [Areas of London we cover](https://orthodontistslondon.com/london-areas)

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