What are bio. retainers made of?

A bio-derived, plant-based polymer — independently tested for microplastic and BPA-derivative release, with results published by lot, BPA, BPS, BPF and phthalates. No other UK retainer brand has published equivalent testing.

Why is bio. the only retainer brand to publish microplastic testing?

Every retainer in the UK market is made from standard thermoplastic that has not been independently tested for microplastic shedding. bio. is the first to test ours and the first to publish the data.

How does the impression kit work?

Order online and your kit arrives next day with step-by-step instructions and a video walkthrough. It takes about 10 minutes at home. Post it back in the included pre-paid packaging. Custom retainers are delivered within 5 working days.

Why do I need to replace my retainer each year?

Teeth shift and materials age. An annual replacement is the standard of care, and the subscription keeps a fresh, tested set on your teeth without re-ordering.

Is this teledentistry?

No. Every case is managed by a registered UK clinician. Clean materials and proper supervision are part of the same product.

The only plant-based clear aligner in the UK

bio.aligners. Straighter teeth, without the plastic.

Name: bio.retainers
Brand: bio.
Availability: InStock

Teeth straightening at home usually means one thing: petroleum-based plastic against your teeth 22 hours a day for months. bio.aligners aren't that. Ours are made from a plant-based, BPA-free material — independently tested, with results published by lot at the bio. Standard — and every case is designed by a UK-registered specialist orthodontist.

✓ Plant-based, not petroleum plastic ✓ BPA, latex & phthalate-free ✓ Specialist orthodontist-designed ✓ Tested & published · from £950

Book free consultation → See the test results →

Indicative pricing. Final cost confirmed at your free consultation, based on your treatment plan.

A sequence of three clear bio.aligners on warm linen in afternoon light

Before clear aligner treatment — gaps and spacing — BeforeAfter

After clear aligner treatment — gaps closed — BeforeAfter

Before clear aligner treatment — crowded teeth — BeforeAfter

After clear aligner treatment — aligned smile — BeforeAfter

Real cases treated with clear aligners. See more results ↓

The difference

Not a plastic aligner.

Clear aligners sit against your teeth and gums for 22 hours a day, for months at a time. Almost every brand in the UK — the ones you've heard of — makes them from petroleum-based plastic. We took a different route.

bio.aligners

✓ Plant-based material
✓ BPA-free
✓ Latex & phthalate-free
✓ Independently tested, published by lot
✓ Industrially compostable

Typical UK aligners

— Petroleum-based plastic
— Material rarely disclosed
— No published testing
— Not compostable
— Sold as a commodity

We're the only UK aligner made this way. We don't ask you to take that on trust — the material is tested by an independent ISO 17025 laboratory and every result is published by lot at the bio. Standard. That's the whole point of bio.: what touches your body, shown in the open.

Comparison reflects commonly advertised material practices across UK at-home aligner brands; individual providers vary. Compostability refers to industrial composting standards for the aligner material.

Free consultation

Book your free consultation.

A 15-minute video call to review your teeth, confirm suitability honestly, and talk you through bio.aligners. No obligation, no cost.

1 · Choose a time

Consultations run at 5:30pm, Monday, Tuesday and Thursday.

Thank you — your consultation request is in. We'll email you to confirm your 5:30pm slot. Please keep an eye on your inbox.

Free · 15 minutes · no obligation

Results

Real cases. Real movement.

A selection of before-and-after cases treated with clear aligners. Individual results and treatment times vary — suitability is always confirmed at your consultation.

Before clear aligner treatment — crowded, protruding upper front teeth — Before

After clear aligner treatment — straightened, even upper front teeth — After

CrowdingUpper & lower

Before clear aligner treatment — spacing and gaps between teeth — Before

After clear aligner treatment — gaps closed, aligned bite — After

Spacing & gapsFull arch

Before clear aligner treatment — crowded lower teeth — Before

After clear aligner treatment — aligned lower teeth — After

CrowdingLower arch

Before clear aligner treatment — crowded, uneven front teeth — Before

After clear aligner treatment — even, aligned smile — After

Crowding & alignmentUpper & lower

Before clear aligner treatment — misaligned front teeth — Before

After clear aligner treatment — straightened front teeth — After

AlignmentUpper arch

Before clear aligner treatment — uneven tooth edges — Before

After clear aligner treatment — even, level smile — After

Alignment & levellingUpper arch

Before clear aligner treatment — mild crowding — Before

After clear aligner treatment — aligned teeth — After

Mild crowdingFull arch

Before clear aligner treatment — uneven, gapped front teeth — Before

After clear aligner treatment — straightened, aligned smile — After

Alignment & spacingUpper arch

Cases shown are real treatment outcomes. Results, treatment times and suitability vary by individual and are confirmed by your orthodontist at consultation.

How it will work

/ 01

Free online consultation

Tell us about your teeth. Our clinical team reviews suitability honestly — we won't take cases we can't treat well.

/ 02

One scan appointment

A single visit near you for a digital scan — then the rest of your teeth straightening happens at home.

/ 03

Designed, delivered, monitored

A UK specialist orthodontist designs your plan. Your aligners arrive at your door, with remote check-ins throughout — and bio.retainers at the end.

Is it right for you?

Who bio.aligners is for — and who it isn't.

Well suited

Clear aligners work well for mild to moderate crowding, spacing and gaps, minor bite issues, and teeth that have drifted back after braces. If your front teeth bother you in photos but your bite is broadly comfortable, you're likely in this group — most of the cases in our gallery above started exactly there.

Not the right fit

Severe crowding, significant bite problems, jaw discrepancies, or teeth with untreated decay or gum disease need in-person specialist care first. If that's you, we'll say so plainly at the consultation and point you in the right direction — we don't take cases we can't treat well.

The honest answer for most people is "probably suitable, but it depends on your scan" — which is exactly what the free consultation is for. No obligation, and if aligners aren't right for you, you'll leave knowing what is.

How bio. compares

What makes this different.

bio.aligners

Typical at-home brands

Treatment design

UK specialist orthodontist, every case

Often software-led or general dentist review

Material testing

Independently tested, published by lot

Typically not published

In-person care

One scan visit, remote monitoring after

Varies — often none at all

Aftercare

bio.retainers included on completion

Usually sold separately

Comparison reflects commonly advertised practices across UK at-home aligner brands; individual providers vary.

Questions

What will bio.aligners be made of? +

A plant-based, BPA-free material — not the petroleum-based plastic used by other UK aligners. It's independently tested by an ISO 17025-accredited laboratory, with results published by lot at the bio. Standard. Aligners are replaced every one to two weeks, so their exposure profile differs from retainers; we publish what we find for both.

Who designs the treatment? +

Every case will be personally designed and approved by a UK-registered specialist orthodontist — not software alone, and not a general dentist.

Who is it for? +

Mild to moderate crowding, gaps, bite issues, and post-brace relapse. Suitability is confirmed honestly at the free consultation. Comparing options? Read our honest guide to Invisalign alternatives in the UK.

How do I start? +

Book a free consultation above. We'll review your teeth, confirm suitability honestly, and talk you through the plan and final pricing — no obligation.