A new “smart” toothpaste fights gum disease by disarming bad bacteria—without harming the good ones. Credit: Shutterstock Periodontitis is a common condition that can affect much more than just oral health. Scientists at Fraunhofer have discovered a compound that specifically blocks the bacteria responsible for this disease while leaving the rest of the oral microbiome intact. This innovation has since been developed into a range of oral care products by the spin-off company PerioTrap. The