Crest expanded its line of gum health-focused toothpastes with Crest Gum and Sensitivity, which the Procter & Gamble-owned brand said targets the gum line. The toothpaste uses stannous fluoride to help neutralize plaque bacteria, while the formula works to help protect against and help treat sensitivity discomfort caused from one or more of these triggers. It helps prevent sensitivity by wrapping teeth in a shield of protection against hot and cold food and drink triggers such as ice cream,...