Tough on Plaque Gentle on Gums. Expert Clean. Superior cleaning Along the Gumline (vs. a regular manual toothbrush). Flexing sides adjust for a custom clean. Removes up to 93% of Plaque in Hard to reach areas (with regular use). Improves oral health in 2 weeks (by reducing gingivitis in a short term clinical trial). No. 1 Dentist Recommended Brand worldwide, Oral-B. Change your brush every 3 Months for A Better Clean.