A smarter clean
See your pressure, keep timing in view and add optional app coaching when you want more guidance.
Explore the iO9The iO9, chosen by dentists.
Colour display, pressure feedback and seven modes. Meet the Oral-B iO9 Black Onyx, chosen by practising dentists for your daily routine.
£164.99 Black Onyx · In stock · Free UK delivery
- Dentist-selected
- Chosen by practising dentists
- Free UK delivery over £50
- Same-day dispatch before 4pm
- 30-day returns on unopened items
- Secure Shopify checkout
Choose by what matters to you
Three simple ways to find the right product for your daily routine.
Keep your brush performing
Keep four iO Ultimate Clean heads ready, with indicator bristles that fade towards white as a change cue.
See compatible heads
Sensitive teeth
Choose Biorepair Plus Sensitive Teeth for fluoride-free care with 24% microRepair® listed by Coswell.
See the formulaThe Onyx bundle
Your complete set. Save £11.98.
Choose the Sensitive Teeth or Total Protection bundle. Each includes the Oral-B iO9 Black Onyx, four Ultimate Clean heads and the named Biorepair Plus toothpaste for £180 instead of £191.98.
Bundle price £180.00
Choose your toothpasteChoose Sensitive Teeth or Total Protection at the same bundle price.
Electric toothbrush
Oral-B iO9 Electric Toothbrush
Premium iO brushing with a colour display, visible pressure guidance and optional app coaching.
£500.00
£164.99
Replacement heads
Oral-B iO Ultimate Clean Heads, Black, 4 Pack
Four black Ultimate Clean heads made exclusively for Oral-B iO toothbrushes.
£20.00
Your toothpaste
Biorepair Plus
Choose Sensitive Teeth or Total Protection, both with fluoride-free microRepair® technology.
One toothpaste included
Compare the essentials
See the practical difference between the iO9, compatible replacement heads and two fluoride-free toothpaste choices.
Oral-B iO9 Electric Toothbrush
£500.00
£164.99
Interactive colour display, visible pressure guidance and optional connected coaching—now £164.99 with free UK delivery.
View product
Oral-B iO Ultimate Clean Heads, Black, 4 Pack
£20.00
Four black iO Ultimate Clean heads with 16-degree angled bristles and visible replacement indicators.
View product
Biorepair Plus Sensitive Teeth Fluoride-Free Toothpaste
£6.99
Fluoride-free specialist toothpaste with 24% microRepair® listed by the manufacturer.
View product
Biorepair Plus Total Protection Fluoride-Free Toothpaste
£6.99
Fluoride-free everyday toothpaste with 20% microRepair® listed by the manufacturer.
View productFluoride-free choices, without the guesswork
Compare Sensitive Teeth and Total Protection in plain English. Both are fluoride-free and use the manufacturer's microRepair® technology at different listed concentrations.
Choose your formula
Sensitive Teeth contains 24% microRepair®; Total Protection contains 20%, as listed by the manufacturer.
Premium fluoride-free care
Biorepair Plus brings patented zinc-hydroxyapatite technology to two specialist toothpastes, both priced at £6.99.
microRepair® technology
Biorepair describes microRepair® as creating a temporary coating over enamel-surface micro-scratches with regular twice-daily use.
Why shop with Onyx
We combine private-practice experience with focused product selection, clear explanations and reliable UK delivery.
More than 100 years combined
Our private-dentist team brings its combined experience to the way products are reviewed and explained.
Premium, fairly priced
Standout products at prices that make better home care easier to own.
Value that earns its place
Every product is chosen by our dentist team for quality, usefulness and a price worth paying.
Quick answers
Straight answers about products, compatibility, bundle value and delivery.
What does the Onyx selection include?
Our private-dentist team selects a focused range of premium oral-care essentials for home use. The current selection is shown above.
Are the replacement heads compatible with every Oral-B brush?
No. Our Ultimate Clean replacement heads are made exclusively for Oral-B iO toothbrushes. Look for ‘iO’ in your toothbrush model name.
What is microRepair®?
microRepair® is Biorepair's patented zinc-hydroxyapatite technology, listed at 24% in Sensitive Teeth and 20% in Total Protection.
How will my order be delivered?
All UK orders are sent by Royal Mail Tracked 24. Delivery is £4.99, or free from £50. Order before 4pm for same-day dispatch.
Our holistic approach
How we choose what we sell.
A whole-person view of oral care: fewer products, clearer reasons and formulas you can understand.
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Ingredient-conscious
We read the whole label. Our toothpaste picks are fluoride-free by choice, built on hydroxyapatite: the same mineral your enamel is made of.
Read our approach -
Evidence-led, not trend-led
We only stock products we can explain with published research and manufacturer data, and we say clearly what they can and cannot do.
Read our approach -
Prevention first
Better brushing, sensible replacement cycles and gentle formulas do more for long-term oral health than quick fixes.
Read our approach
Make better brushing your daily routine.
Shop the iO9From the Onyx journal
Best Oral-B electric toothbrush 2026: a UK dentist's guide to every model, from Vitality to iO10
Vitality, Pro or iO? What each Oral-B model does well, what it gives up against the iO9, and why the dentists behind Onyx chose the iO9.
Best Oral-B electric toothbrush 2026: a UK dentist's guide to every model, from Vitality to iO10
Best electric toothbrush for kids (UK): a dentist's guide by age, from toddlers to teens (2026)
What age to start, which brush suits a three- or six-year-old, the iO9 for teenagers, the hydroxyapatite toothpaste many parents ask us about, and Oral-B iO Kids vs Pro Kids.
Best electric toothbrush for kids (UK): a dentist's guide by age, from toddlers to teens (2026)
Oral-B iO9 vs Philips Sonicare: which is better? A UK dentist compares the DiamondClean 9000 and Prestige 9900
How the iO9’s pressure feedback, display and modes compare with the DiamondClean 9000 and Prestige 9900, plus the cost of genuine Onyx replacement heads.
