Comfort grip. The brand more dentists use themselves. At Oral-B we care for your oral health by developing innovative products that are trusted by dental professionals worldwide. Ergonomically designed handle for better comfort and control. Gum Massaging Bristles: Outer angled bristles gently massage and stimulate your gums and help clean along the gum line. Indicator Bristles: Blue Indicator bristles fade halfway so you know when to replace your brush. Dentists recommend changing your brush every 3 months. Clinical research proves that a new toothbrush can remove 30% more plaque than one 3 months old (J Clin Dent 2002; 13:119-124. Research with a flat trim toothbrush.). Made in USA.