Compared to a manual toothbrush, it can remove up to 100% more bacterial plaque, leaving teeth and gums cleaner. Genuine Oral-B brush heads are the only ones that have For best cleaning results, use X-shaped bristles to clean in places that ordinary ones can't. Features of Oral-B Precision Clean Three different bristle sizes for accurate cleaning With the exception of pulsonic and iO toothbrushes, Oral-B electric rechargeable toothbrushes are guaranteed to fit. The bristles on the brush head turn from green to yellow as a usage indicator, alerting you when to replace them for optimal cleaning effectiveness. With clinically demonstrated results, Oral-B is the most popular brand among dentists worldwide.