Power tip Bristles. At Oral - B we care for your oral health by developing innovative products that are trusted by dental professionals worldwide. Extra long bristles help clean hard to reach places. Indicator Bristles: Blue indicator bristles fade halfway so you know when to replace your brush. Dentist recommend changing your brush every 3 months. Clinical research proves that a new toothbrush can remove 30% more plaque than on 3 months old. Control Grip: Control grip handle ensures complete control and comfort. Made in USA.