Aligner pricing is one of the most searched dental cost questions in both the UK and the US, and one of the least standardised: the same case can be quoted at widely different figures depending on aligner count, clinician grade and retention policy. This reference sets out what clear aligners and fixed braces each do mechanically, which malocclusions fall outside aligner scope, how long treatment realistically takes, and how 2026 price ranges compare between the UK, the US and Turkey.
What is the clinical difference between aligners and fixed braces?
Both systems move teeth by applying sustained light force to the periodontal ligament, which remodels the surrounding bone. The difference is how that force is delivered and controlled. Fixed appliances bond brackets to each tooth and thread an archwire through them, so the clinician controls tipping, rotation, torque and vertical position directly through wire sequencing.
Clear aligners deliver force through a series of thermoformed plastic trays, each shaped to a planned incremental position. Because plastic grips a smooth crown poorly, aligners rely on bonded composite attachments and precision cuts to transmit rotational and vertical force. Control is planned digitally up front rather than adjusted chairside, which makes case selection and mid-course monitoring decisive.
- Fixed braces: continuous force, clinician-controlled, independent of patient compliance
- Aligners: intermittent force, requires 20-22 hours of daily wear to stay on plan
- Aligners are removable for eating and cleaning, so oral hygiene is easier to maintain
- Fixed braces carry a higher risk of decalcification around brackets if hygiene is poor
Which cases are suitable for clear aligners?
Aligners handle mild to moderate crowding and spacing, relapse after previous orthodontics, and many alignment-only cosmetic cases predictably. Difficulty rises with the amount of rotation, extrusion, or skeletal correction required, and some movements remain notably less predictable in plastic than in wire.
A treatment plan that promises full correction of a severe skeletal discrepancy with aligners alone, without auxiliaries, elastics or surgical input, warrants a second opinion. Equally, an aligner refusal for straightforward crowding may simply reflect a practice's equipment rather than a clinical limit.
- Generally aligner-suitable: mild to moderate crowding, spacing, orthodontic relapse
- Often needs auxiliaries or fixed appliances: severe rotations of round-rooted teeth, significant extrusion, deep bite opening
- Usually outside aligner scope alone: pronounced skeletal Class II or III discrepancy, cases requiring orthognathic surgery
- Any active decay or periodontal disease is treated before orthodontics begins, in either system
How long does each treatment take?
Timelines depend on case complexity rather than the appliance itself. Simple alignment can finish in a few months with either system; comprehensive correction usually runs beyond a year. Aligner cases progress on a fixed tray schedule, so lost or under-worn trays extend treatment; fixed cases progress at review appointments.
Retention is permanent in both routes and is not an optional extra. Teeth relapse toward their previous position for the rest of life, so a bonded lingual wire, a removable retainer, or both is the normal endpoint. When comparing quotes, confirm whether retainers, replacements and review visits are included.
| Case type | Clear aligners | Fixed braces |
|---|---|---|
| Minor anterior crowding or relapse | 4-8 months | 5-9 months |
| Moderate crowding, non-extraction | 10-16 months | 12-18 months |
| Comprehensive, extraction case | 18-30 months | 18-30 months |
| Skeletal correction with surgery | Not appliance-alone | 24-36 months plus surgery |
| Retention after treatment | Lifelong | Lifelong |
How much does Invisalign cost in the UK, the US and Turkey?
Published price ranges are wide because a quote bundles several variables: the number of aligners, the clinician's grade, digital scanning and monitoring, refinement rounds, and retention. Cost per tooth is not a meaningful unit in orthodontics; the case fee is.
The ranges below reflect commonly advertised 2026 private figures across the three markets. They are indicative rather than quotations, and they exclude travel, accommodation, and any restorative work needed before or after alignment.
| Treatment | United Kingdom | United States | Turkey |
|---|---|---|---|
| Clear aligners, limited case | £1,800-£3,000 | $2,500-$4,000 | €900-€1,600 |
| Clear aligners, comprehensive | £3,500-£5,500 | $4,000-$8,000 | €1,600-€3,000 |
| Fixed metal braces | £2,000-£4,000 | $3,000-$7,000 | €800-€1,800 |
| Ceramic or lingual braces | £3,000-£6,500 | $4,000-$10,000 | €1,200-€2,800 |
| Retainers after treatment | £150-£400 | $200-$600 | €80-€250 |
What should a cross-border orthodontic plan include?
Orthodontics differs from single-visit cosmetic work: it needs periodic review over months, which is the main practical constraint on treating it abroad. Aligner cases can be structured around fewer in-person visits with remote monitoring and trays issued in batches, but a plan must state explicitly how reviews, refinements and emergencies are handled.
Our index scores clinics on verifiable structural factors rather than price, and orthodontic capability sits within the technology and international-care criteria: intraoral scanning, in-house treatment planning, named clinicians with recorded qualifications, and documented aftercare pathways.
- Named treating clinician and their recorded orthodontic qualification
- Digital records: intraoral scan, radiographs, and the planned final position before payment
- Written scope: number of aligner sets, refinement rounds included, and what triggers a surcharge
- Retention plan, replacement policy, and who manages a broken bracket or lost tray at home
- Documented route for remote review between visits