You brush your teeth twice a day, so why is your dentist still finding plaque buildup or mentioning your gumline?
When it comes to brushing, technique matters, but the toothbrush you’re using makes a big difference, too. While electric toothbrushes certainly level up the old-school manual brush, not all electric toothbrushes clean your teeth the same way. With different brush-head shapes, modes and movements to tackle plaque, there’s more to consider than how many smart features are packed into the handle.
Backed by clinical research, Oral-B iO electric toothbrushes outperform manual and sonic toothbrushes with a dentist-inspired, oscillating-rotating round brush head and micro-vibrations that clean deeper.
Here’s the technology behind the line and what to know when choosing between the Oral-B iO2, iO3 and iO9.
Do all electric toothbrushes clean the same?
Switching from a manual toothbrush to an electric one is a big upgrade in itself. Once you start shopping, you’ll enter a world of dizzying differences. But when it comes to cleaning, one difference matters in particular: how the brush head moves.
According to the American Dental Association, electric toothbrushes can use different types of brush-head movement, including side-to-side and rotation-oscillation. Sonic electric toothbrushes generally use a side-to-side sweeping motion. The Oral-B iO Series, on the other hand, has a round brush head that oscillates and rotates, mechanically disrupting plaque as it moves around individual teeth.
The shape of the head also matters. Rather than using an elongated head that sweeps across several teeth, the iO’s dentist-inspired round brush head is designed to surround individual tooth surfaces. Oral-B adds gentle micro-vibrations to that oscillating-rotating movement for a pleasant, tooth-spa-like treatment with every session.
This high-tech combo forms the foundation of the iO lineup. Depending on which model you choose, you’ll also find features that provide feedback on your brushing and help you get more out of those two minutes at the sink.
The science behind the Oral-B iO clean
What does that combination of a round brush head, oscillating-rotating movement and micro-vibrations mean for your teeth? Clinical studies offer some insight.
Oral-B’s iO technology has been tested in clinical studies examining plaque removal and gum health. In one eight-week, examiner-blind randomized controlled trial, researchers compared the Oral-B iO Series with the leading sonic-powered competitor, and found that the iO delivered 29% more whole-mouth plaque removal and a 62% greater reduction in gingivitis compared with the competing brush.
Researchers also studied what happens when people move from a manual toothbrush to the Oral-B iO. In a separate eight-week randomized trial of adults with gingivitis and plaque, 81.8% of iO users were classified as healthy at the end of the study, compared with just 23.6% of manual toothbrush users.
The results were significantly greater reductions in plaque and gingivitis among the iO group, with benefits observed after a single brushing and continuing through week eight. Independent research has also found some evidence that rotating oscillating brushes reduce plaque and gingivitis more than side-to-side powered brushes in the short term.
In other words, the shape and movement of the brush head aren’t just design choices; they’re central to how the iO cleans.
Which Oral-B iO electric toothbrush is right for you?
The Oral-B iO2, iO3 and iO9 share the same core cleaning technology, with different features and levels of guidance. Moving up the range adds more feedback, customization and personalization.
| Model | List price* | Cleaning modes | Standout features | Best for |
| Oral-B iO2 | $64.99 | 3 | Gum pressure sensor, 2-minute timer, long-lasting battery | First-time electric toothbrush users |
| Oral-B iO3 | $89.99 | 3 | 360-degree visible gum pressure sensor, 2-minute timer | Everyday users looking to balance meaningful brushing feedback and value |
| Oral-B iO9 | $329.99 | 7 | Color display, AI brushing recognition, 3D teeth tracking, Bluetooth and fast charging | Users who want the most premium, feature-rich iO experience |
Your straightforward electric upgrade
Oral-B iO2
If you’re moving up from a manual toothbrush, the iO2 is designed to make that switch simple. Its three unique cleaning modes include Super Sensitive, Gentle and Daily Clean, while an automatic pressure sensor slows the brush and signals red if you’re pressing too hard. A two-minute timer helps you stick to the ADA-recommended two minutes of brushing, with alerts every 30 seconds reminding you to move to another area of your mouth. It’s a straightforward introduction to the advanced iO technology with everyday essentials covered.
Your pressure-checking sidekick
Oral-B iO3
The iO3 electric toothbrush steps up with more detailed pressure feedback. Its 360-degree Visible Gum Pressure Sensor tells you when you’re brushing too hard, too lightly or with the right amount of pressure. You also get three modes: Daily Clean, Sensitive and Whitening. That makes the iO3 a balanced option for someone who wants meaningful everyday brushing feedback to help improve everyday brushing habits.
If you tend to attack your teeth with your toothbrush, that feedback could come in handy. Research suggests that pressure-detecting electric toothbrushes can help people adjust the amount of force they use while brushing.
Your high-tech brushing coach
Oral-B iO9
For the most premium iO experience, the iO9 pairs Oral-B’s advanced iO cleaning technology with more customization, guidance, and premium features. Think of the iO9 as part electric toothbrush, part brushing coach. Its interactive color display puts information like your brushing mode, charging status, and two-minute timer right on the handle, while the seven unique cleaning modes let you personalize each session to your needs, whether you’re looking for an everyday clean, extra attention to gums or sensitivity, or a more intense, deep clean.
The iO9 also comes equipped with a Smart Gum Pressure Sensor, plus Bluetooth connectivity to the Oral-B app for AI Brushing Recognition and 3D Teeth Tracking to help you see which areas you’ve covered and provide more detailed feedback on your technique.
For everyday convenience, the iO9 also includes a magnetic charger that fully charges the toothbrush in about three hours and a charging travel case. Together, these features make the iO9 the most elevated expression of the iO lineup, designed for someone who wants more personalization and active oral health coaching from their electric toothbrush.
What should you look for when choosing an electric toothbrush?
It’s natural to compare electric toothbrushes by price, number of modes or the smart features listed on the box. But for the best investment, start with how the toothbrush actually cleans and whether there’s clinical evidence to support it. The American Dental Association, for example, considers evidence of plaque removal and gingivitis reduction when evaluating toothbrushes for its Seal of Acceptance.
Dr. Tara Aboumahboub, DMD also commented in a recent Oral-B press release. “Patients ask me all the time whether one electric toothbrush is really different from another,” she said in the release. “The answer is yes, but the difference isn’t about having more features, it’s about how the toothbrush cleans. A dentist-inspired round brush head paired with oscillating-rotating technology and micro-vibrations like the Oral-B iO Series is clinically shown to help remove plaque in areas people often miss, especially along the gumline. When choosing an electric toothbrush, I encourage patients to look for technology that is supported by clinical evidence and helps them build healthy brushing habits they can stick with.”
Look at the brush-head design and movement, along with research on plaque removal and gum health. From there, think about how much guidance you’d find useful. If you’re making your first move from a manual toothbrush, the streamlined iO2 may have what you need. The iO3 adds more visible feedback to help you fine-tune your pressure, while the iO9 turns brushing into a more personalized experience with real-time tracking and coaching.
The right electric toothbrush isn’t necessarily the one with the flashiest tech — it’s the one with cleaning technology you trust and features you’ll actually use twice a day.
Explore the Oral-B iO brush line for your personal, professional daily clean today.
Disclosures
*List prices from Oral-B at the time of publication. Prices may vary.
