/ 02 — BIO.RETAINERS
The only retainer
in the UK confirmed free
from harmful microplastics.
You wear your retainer for 8 hours every night. For years. unaware that your retainer is sheeding thousands of microplastic particles. We want to change this by developing plastic free retainers.
No other retainer brand in the UK has published independent third-party testing data for microplastic particle release. We have. Results published in full.
"bio. retainers are the only retainers in the UK independently tested for microplastic particle release and confirmed free from harmful microplastics. This is not a marketing claim. It is a published scientific result."
— BIO. STANDARD
Every bio. retainer is independently tested for:
Full reports by lot number at bio.uk/standard. Re-tested on every new production batch.
— THE BIO. MATERIAL DIFFERENCE
What bio. is made of.
Most dental device brands never disclose their materials. We built the opposite model: every substance disclosed, every claim tested, every result published.
100% Microplastic-Free
No unstable plastics that fragment and leach into your body over time. bio. materials are independently tested for microplastic particle release under simulated wear conditions — confirmed below detection limits.
I
Advanced Organic Polymers
Formulated from biocompatible organic polymers derived from plant-based sources. Extreme durability, long-term safety. Full polymer composition disclosed by FTIR spectroscopy — a standard no other UK brand meets
II
Independently Tested
Every production batch tested by an ISO 17025-accredited laboratory. Results for BPA, BPS, BPF, phthalates, heavy metals, and microplastic release published in full by lot number. Re-tested on every new production run.
III
— HOW TO ORDER
Placing an Order
I. Choose your retainer
II. Choose your impression method
From home
/ 01 - 0RDER A KIT
Impression kit
No scan, no problem. Your kit arrives next day with step-by-step instructions and a video walkthrough. Take your own impressions in about 10 minutes, then post them back in the included pre-paid packaging.
Next-day kit · 5 working days return
/ 02 — ALREADY SCANNED
Upload a digital scan
If your dentist or orthodontist has taken an intraoral scan, you can upload the files directly — we accept standard STL and PLY formats. We check them, confirm they're usable, and go straight to manufacture. The fastest route to a finished retainer.
STL / PLY files · Fastest turnaround
At a practice
/ 03 - FROM EXISTING MODELS
Send physical models
Already have study models or casts from a previous clinician? Post them to us and we'll digitise them in our lab to build your retainer — no new impressions needed. We return your original models with your finished set.
Casts & models · Originals returned
No visit needed
In case you need help
/ 04 - VISIT A PARTNER PRACTICE
Get scanned in person
Prefer a professional to take the impression? We'll connect you to your nearest bio. partner practice for a 15-minute digital scan at no extra cost. More precise, with the same turnaround — and recommended if your case is more complex or you'd simply rather have it done for you.
15-min appointment · No extra cost · Recommended for complex cases
— PRICING
Your retainer is custom-made to your teeth. The subscription keeps your set fresh year on year — teeth shift, materials age. An annual replacement is the standard of care.
Simple pricing.
FIRST SET
Starting at £175
Includes impression kit + custom retainers. Delivered in 5 working days.
ANNUAL SUBSCRIPTION
Starting at£140/yr
Annual replacement set. Fresh retainers, every year, delivered automatically.
Subscribe for greater value