Taking care of your pearly whites isn't rocket science, but it's easy to slip into habits that could cause heartache -- er, toothache -- in the long run. We got the latest on giving your teeth the TLC they need from two New York City pros: Alice Lee, DDS, an assistant professor in the Department of Dentistry for Montefiore Health System, and Alison Newgard, DDS, an assistant professor of clinical dentistry at Columbia University College of Dentistry, will clue you in on where you could be going wrong. Multitasking while you brush Every minute in the morning feels precious, so it's tempting to brush your teeth in the shower or while scrolling through your Twitter feed. "To each his own," says Dr. Newgard, "but I prefer patients to be in front of a mirror, over the sink; you can be sure to hit all the surfaces of your teeth, and you'll do a more thorough job when you're not distracted." Better to leave the bathroom a few minutes later having give...