Innovative clean improves oral health in 2 weeks (By reducing gingivitis in a short term clinical trial). Individual flexing sides! Oral-B - The brand more dentists use themselves worldwide. How does Advanced Pro-Flex work? Advanced Pro-Flex has flexing sides that adjust to the unique curves and contours of your teeth, including gumline, for a superior clean vs. a regular manual toothbrush. Because of its flexibility, Advanced Pro-Flex is gentle on gums too. For more oral care information, visit www.OralB.com or call 1-800-56-OralB (1-800-566-7252). www.pg.com.