health fitness

Oral-B iO Series 9 Review - The $300 Toothbrush My Dentist Noticed

★★★★½4.5(8,500 reviews)

By MikeUpdated 2026-06-17

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Oral-B

$299.99

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⭐ Our Verdict

Best electric toothbrush if you want feedback on your brushing technique. Sonicare DiamondClean is quieter and sleeker. Oral-B wins on brushing feedback and plaque removal.

✅ Pros

✓3D teeth tracking shows missed spots in real-time
✓Pressure sensor lights up red when brushing too hard
✓7 brushing modes including tongue clean
✓Interactive color display on handle
✓My dentist noticed the difference at my cleaning

⚠️ Cons

✗$300 is 10x a manual toothbrush
✗App is required for full tracking features
✗Replacement heads cost $40 for 4-pack
✗Charging puck takes up counter space

At my last dental cleaning, my hygienist asked what changed because my plaque levels were significantly lower. The answer: Oral-B iO Series 9 with 3D tracking.

Oral-B iO vs Sonicare DiamondClean

Oral-B: round oscillating head, 3D tracking, better plaque removal in studies, $300. Sonicare: sonic vibration, sleeker design, quieter, better for sensitive gums, $250. Both are excellent. Oral-B for tech and plaque removal. Sonicare for sensitive teeth and quiet operation.

Best Price

$299.99 on Amazon. Series 7 ($199) has similar features without color display.

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Frequently Asked Questions

iOs Series 9 vs Series 7?▼

Series 9: color display, 7 modes, 3D tracking. Series 7: black/white display, 5 modes, similar tracking, $100 less. Get Series 7 and save $100 unless you want the color screen.