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Written by Joanna Marie Macute, Director of Telehealth Clinical Operations | Fact-Checked for Clinical Accuracy
After completing orthodontic treatment, your orthodontist will recommend retainers to keep your teeth in their new position. You'll typically be given a choice: a fixed (bonded) retainer — a wire permanently attached behind your teeth — or a removable retainer you take in and out yourself. Both work. But they suit different patients, and the wrong choice leads to problems down the line.
A fixed retainer is a thin stainless steel or fibre-reinforced composite wire bonded to the back (lingual) surface of your front teeth — usually the lower six. It cannot be removed. Your orthodontist or dentist attaches it with dental adhesive at the end of active treatment.
"Fixed retainers are the gold standard for compliance — there's no risk of forgetting to wear them. But the trade-off is hygiene difficulty and the risk of wire detachment over time."
Yes — many orthodontists in the UK fit a fixed lower retainer for the front teeth (highest relapse risk) and provide a removable upper retainer. This dual approach provides the reliability of a permanent lower retainer with the removability of a clear upper tray.
Common issues you should know about before choosing a fixed retainer:
When a bonded retainer wire detaches, you have two options: get it re-bonded (£80–£200 per visit) or switch to a removable retainer. Many UK adults who experience wire failures choose NewSmile clear retainers at £109 as a cost-effective permanent alternative — impressions are taken at home, no dental appointment needed.
NHS orthodontic treatment for children under 18 typically includes a retainer. Fixed retainers may be included depending on your case. Adults receiving private orthodontic treatment will need to discuss retainer options with their orthodontist.
Yes — you will feel the wire with your tongue, especially on the lower front teeth. Most patients adapt within a few weeks and it becomes unnoticeable.
With proper care, bonded retainers can last 10–20 years. However, they commonly require re-bonding or repair at some point — particularly if you grind your teeth or eat hard foods frequently.
 retainer is a thin wire permanently attached to the back of your teeth. It requires no daily compliance and lasts indefinitely — but it cannot be removed for cleaning. NewSmile clear removable retainers st...&media=//www.newsmilelife.co.uk/cdn/shop/articles/generated-image-1779289151337-0_600x.jpg?v=1779290626){kind=link}