Bottom permanent retainer
A bottom permanent retainer is a bonded wire on the tongue side of lower front teeth that helps limit tooth movement after orthodontic treatment.
The short answer
A fixed lingual retainer is a thin orthodontic wire attached with composite resin to the back surfaces of lower incisors or canines. It works by resisting unwanted tooth movement while remaining in place during routine activities.

What is the direct answer?
What does this question mean?
This describes the anatomy and mechanism involved, including the tissues or material that can explain the finding.
What can you do next?
Keep the area clean, avoid aggravating triggers, and arrange an examination so the clinician can inspect, test, and image it when indicated.
When should you seek dental care?
Seek prompt care for persistent or worsening symptoms, and urgent assessment for facial swelling, fever, or difficulty swallowing or breathing.
What should you ask the dentist?
Ask what structure is affected, which examination or image is needed, and which treatment addresses the cause.
Frequently asked questions
Can home care replace an examination?
Home care may ease irritation, but the underlying cause determines whether dental treatment is needed.
What should I mention at the visit?
Describe when it began, where it occurs, its triggers, duration, and any recent dental work or injury.
