Prevention & care
Orthodontic treatment: active braces and aligners, bite problems and retention
On this page
Orthodontic treatment changes tooth positions and, in selected growing patients, addresses jaw relationships. The starting problem may be crowding, spacing or the way upper and lower teeth meet. A product name does not identify which movement or bite problem a treatment plan is meant to correct.[3]
Active treatment and holding a result
| Term | Meaning | Boundary |
|---|---|---|
| Fixed braces | Brackets and a wire apply forces to move teeth | They require adjustment and care while attached[1] |
| Clear aligners | A prescribed sequence of removable trays moves teeth progressively | Their effect depends on wear and the planned movement[2] |
| Retainer | A device used after active treatment to limit renewed movement | Holding a result differs from a sequence intended to change it[1] |
The bite problem comes before the appliance
NHS guidance describes assessment of teeth and jaws, sometimes using photographs, scans or radiographs. Adults as well as young people can have braces, but public funding and eligibility are jurisdiction-specific. In England, treatment is generally offered to eligible people under eighteen with relevant dental problems. Cosmetic preference, chewing difficulty, crowding and a jaw mismatch are not interchangeable indications. A history of a damaged front tooth should be discussed before treatment because it can affect subsequent care.[1]
Being removable introduces both flexibility and responsibility
FDA’s September 2026 page says clear aligners can be removed for meals and cleaning, but may not suit more complex conditions. Not wearing them as directed can prevent the intended progression. FDA has not authorized aligners marketed directly to consumers without dentist or orthodontist supervision. Remote monitoring can be part of a plan, while periodic in-person visits help detect unsafe or unintended movement. FDA registration of a manufacturer is different from authorization of the particular product.[2]
Evidence & uncertainty
Evidence is indication-specific. A trial correcting posterior crossbite in children cannot establish the best adult aligner brand. Immediate alignment, later stability, gum health and need for surgery are also different outcomes.[4]
Selected-source overview · Independent review pendingPublished questions
Are clear retainers the same as active clear aligners?
Selected-source overview · Independent review pending. Read the evidence context.
Their roles differ. Aligners are a sequence intended to move teeth; retainers hold the corrected positions after treatment. A similar transparent appearance does not establish a shared treatment purpose.[2]
Evidence behind this answer
- Clear Dental Aligners
professional guidance · 2026
Selected relevant original official passages inspected · Progression; limitations; supervision; product authorization versus registration
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Can adults receive orthodontic treatment?
Selected-source overview · Independent review pending. Read the evidence context.
Yes. NHS guidance includes adult braces. Eligibility for publicly funded treatment is a separate question and varies with the healthcare system; clinical suitability still requires assessment.[1]
Evidence behind this answer
- Braces
professional guidance · Date not stated
Selected relevant original official passages inspected · Indications; assessment; fixed-brace mechanism; retention; England NHS eligibility
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Is an FDA-registered aligner company the same as an authorized aligner product?
Selected-source overview · Independent review pending. Read the evidence context.
No. FDA distinguishes facility/product registration from review and authorization of a particular device. Ask about the actual product and the supervising dental professional.[2]
Evidence behind this answer
- Clear Dental Aligners
professional guidance · 2026
Selected relevant original official passages inspected · Progression; limitations; supervision; product authorization versus registration
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Do crossbite studies show all fixed braces beat all removable appliances?
Selected-source overview · Independent review pending. Read the evidence context.
No. The cited finding compares specific expansion appliances for posterior crossbite in children. It cannot rank every appliance for crowding, adult alignment or other bite problems.[4]
Evidence behind this answer
- Orthodontic treatment for posterior crossbites
original systematic review · 2021
Original abstract and selected summary/method/results passages inspected; full independent appraisal not completed · 31 studies; specific expansion comparisons; treatment-duration difference
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Does an improved childhood underbite guarantee no later jaw surgery?
Selected-source overview · Independent review pending. Read the evidence context.
No. The selected review found limited long-term evidence. Growth, later bite changes and the original problem complicate translating short-term correction into a lifelong guarantee.[5]
Evidence behind this answer
- Orthodontic treatment for prominent lower front teeth in children and adolescents
original systematic review · 2024
Original abstract and selected summary/method/results passages inspected; full independent appraisal not completed · 29 studies; developmental ages; short and long follow-up; limitations
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Does straightening teeth by itself prove a breathing benefit?
Selected-source overview · Independent review pending. Read the evidence context.
No. A claim about breathing needs evidence for that outcome and clinical problem. BOS cautions about broader promises made for a particular orthodontic approach.[6]
Evidence behind this answer
- BOS Statement: Claims about orthodontics
professional guidance · 2018
Selected relevant original official passages inspected · Misleading claims and individualized assessment
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Crowding evidence does not yield one universal appliance ranking
The 2021 Cochrane crowding review included 24 studies involving 1,314 children aged seven to sixteen. It compared fixed or removable appliances, extractions and related approaches against alternatives or delayed care. Several possible benefits were reported, but confidence in many comparisons was limited. The important question is whether a particular approach creates or preserves suitable space in that developmental setting. A small study of one wire or a lip bumper does not rank all contemporary braces or predict an individual child’s course.[3]
A defined bite problem has more focused evidence
The 2021 posterior-crossbite review included 31 trials and about 1,410 children and adolescents. It found fixed quad-helix and removable expansion plates beneficial for correcting this problem in children. In their direct comparison, quad-helix was more successful and treatment was about three months shorter on average. This finding concerns those expansion appliances and that bite problem. It is not evidence that every fixed brace is quicker or better than every removable appliance for every kind of tooth movement.[4]
A result at treatment completion may not last unchanged
The 2024 underbite review included 29 studies and 1,169 children aged five to thirteen at treatment start. Most measured outcomes immediately after treatment; only one studied longer-term effects. Treatment improved bite and jaw relationships in the short term. In the facemask study, some improvements appeared lost by six years, although orthodontists judged later surgery less likely. Growth and longer follow-up therefore matter when interpreting early photographs or promises about permanently changing a developing jaw.[5]
Define the intended benefit before accepting a broader promise
The British Orthodontic Society cautions about claims that a named orthodontic approach will reliably cure jaw-joint problems, improve breathing or improve speech. Its statement recommends explaining the rationale, alternatives and associated risks, and considering an independent opinion when needed. Orthodontic evidence must match the claimed outcome; straightening teeth alone does not demonstrate a respiratory or pain-treatment benefit. This selected page does not assess a person’s airway, jaw-joint symptoms or need for extraction.[6]
References
- Braces
Professional guidance
NHS · Content/publication date: not stated
Accessed: 2026-10-13 UTC · Selected relevant original official passages inspected
Cited sections: Indications; assessment; fixed-brace mechanism; retention; England NHS eligibility - Clear Dental Aligners
Professional guidance
FDA · Content/publication date: 2026
Accessed: 2026-10-13 UTC · Selected relevant original official passages inspected
Cited sections: Progression; limitations; supervision; product authorization versus registration - Orthodontic treatment for crowded teeth in children
Original systematic review
Cochrane Oral Health · Content/publication date: 2021
Accessed: 2026-10-13 UTC · Original abstract and selected summary/method/results passages inspected; full independent appraisal not completed
Cited sections: Definitions; 24 studies; ages; uncertain comparisons - Orthodontic treatment for posterior crossbites
Original systematic review
Cochrane Oral Health · Content/publication date: 2021
Accessed: 2026-10-13 UTC · Original abstract and selected summary/method/results passages inspected; full independent appraisal not completed
Cited sections: 31 studies; specific expansion comparisons; treatment-duration difference - Orthodontic treatment for prominent lower front teeth in children and adolescents
Original systematic review
Cochrane Oral Health · Content/publication date: 2024
Accessed: 2026-10-13 UTC · Original abstract and selected summary/method/results passages inspected; full independent appraisal not completed
Cited sections: 29 studies; developmental ages; short and long follow-up; limitations - BOS Statement: Claims about orthodontics
Professional guidance
British Orthodontic Society · Content/publication date: 2018
Accessed: 2026-10-13 UTC · Selected relevant original official passages inspected
Cited sections: Misleading claims and individualized assessmentDated professional statement; does not constitute an exhaustive review of all newer airway-related orthodontic research.
Scope & review
- Population
- General readers considering dental care; study-specific populations and ages identified
- Exposure or intervention
- Orthodontic treatment
- Comparison
- Defined bite/crowding interventions compared with no or delayed treatment, specific alternative appliances, and post-treatment retention
- Outcomes
- Definitions, practical distinctions, source-specific clinical outcomes and uncertainty
- Timeframe
- Selected historical and current evidence checked 2026-10-13
- Jurisdiction
- Selected US agency sources, dated professional guidance and original international research; jurisdiction and eligibility are source-specific
Bounded selected-source educational explanation distinguishing official guidance, original research and editorial interpretation. No exhaustive search, independent systematic synthesis or qualified dental review has been completed.
Sources checked on their individual access dates. Selected sources were checked; ongoing surveillance and qualified review have separate statuses on the coverage page.
Revision history
- 2026-10-13 UTC: Added a definition-first dental explanation; qualified independent review remains pending.
What this article still leaves open
- Which movements, growth stage and oral-health findings determine the person’s treatment choices?
- Contemporary aligner-system comparisons, full risk appraisal and qualified review remain incomplete.
Suggest a correction
Submit a content correction to the editorial queue, or download a local note. Leave out personal medical details. Submitted text is stored privately with a browser receipt session and is visible to this browser and the editor. Clearing cookies removes access to your submission history. This is not an account or a medical service.
Your submitted corrections for this article
Explore the topic map
Browse the health domains connected to this article. The map also identifies topics whose articles remain unwritten.