Effortless plaque removal: Perfectly angled bristles remove up to 100 percent more plaque than a manual toothbrush, delivering a thorough clean along the gumline without extra effort No guesswork replacement: Color-changing bristles fade to white to clearly signal when it’s time to change the brush head, so you always maintain optimal cleaning performance Simple 3-month routine: Dentists recommend replacing your brush head every three months, and the visible bristle fade makes timing easy for consistent, hassle-free results Guaranteed iO fit with zero setup: The only replacement brush head designed exclusively for Oral-B iO electric toothbrush handles, ensuring reliable performance with no compatibility concerns Trusted, proven performance: Oral-B is the number one dentist-recommended toothbrush brand worldwide, delivering dependable results you can trust every day