Healthy gum tissue has a V-shaped point between each tooth called a papilla, he explains “In order to keep your gum tissue clean when you floss, you should slide the floss underneath the papilla ...

“You want to sort of cup the floss around your tooth,” the periodontist said. Rub the floss up and down that little triangle of gum (the papilla) your toothbrush can’t reach. Do the same on ...