“Clear aligners” and “Invisalign” get used as if they’re the same thing — they’re not, but they’re closer than the marketing on either side will tell you. Both are removable, near-invisible plastic trays that move your teeth gradually. Both are supervised by dentists. Where they actually differ is brand, lab, price, and the patient experience around the treatment.
Invisalign is one brand. Clear aligner is the category.
Invisalign was the first widely-known clear aligner system, launched in 1999 by Align Technology. Since the original patents expired, dozens of equivalent clear aligner systems have been produced by CE-certified medical labs across Europe and the US. Smila is one of them.
The plastic chemistry, the digital scanning, the clinical principles — they’re effectively the same. What changes is whose brand is printed on the tray and which lab made it.
Where the differences actually show up
| Invisalign | Smila Clear Aligners | |
|---|---|---|
| UK starting price | ~£3,500–£4,500 | From £2,000 |
| Average treatment length | 6–18 months | 4–10 months |
| In-person appointments required | 6–10 typically | 0–2 (remote-supervised) |
| Lab origin | USA / Mexico | EU (CE-marked) |
| Clinical supervision | UK dentist | UK GDC-registered dentist |
| Aftercare retainers included | No (add-on) | Yes |
What’s not different
- Material: Both use medical-grade thermoplastic. Yours won’t feel different in your mouth.
- Clinical control: Both are prescribed by qualified clinicians who plan your tooth movement. There is no version of Smila where AI decides your treatment.
- Visibility: Neither shows up in selfies. Both are removable for eating.
- Aftercare: Both require retainers to keep your new alignment.
Which one should you choose?
If you have access to an Invisalign provider you trust and budget isn’t a constraint, Invisalign is a perfectly good choice — it’s well-supported and the protocol is well-documented. If you want the same clinical outcome at roughly half the UK price, with remote supervision so you don’t have to take time off work for monthly appointments, that’s where Smila fits.
The honest version: see what your clinician at consultation thinks is best for your case, then make a decision on cost and convenience. Book a free Smila consultation and we’ll show you exactly what your plan would look like.
