Biting Nails + Chewing Ice = Worst Habits for Teeth

"In addition to daily brushing and flossing routines, the North Carolina Dental Society recommends avoiding brushing too hard, biting your nails, grinding your teeth or chewing ice when trying to keep your pearly whites in tip-top shape. Breaking these bad habits can keep your mouth healthy and help avoid costly emergency trips to the dentist."

http://wncn.com/2016/12/13/biting-nails-chewing-ice-among-worst-habits-for-teeth/