Key Features of Oral-B Advantage Plus Regular Medium Toothbrush: At Oral -B we care for your oral health by developing innovative products that are trusted by dental professionals worldwide. Gum Massaging Bristles: Outer angled bristles gently massage and stimulate your gums and help clean along the gum line. Blue indicator bristles fade halfway so you know when to replace your brush. Dentists recommend changing your brush every 3 months. Clinical research shows that a new toothbrush can remove up to 30% more plaque than one 3 months old.* * Research with a flat trim toothbrush.