Memory Game Healthy Teeth Memory MatchOnline version Dental Hygiene by Elizabeth Lowes Hard outer layer of tooth Dentin Sugar Second layer of your tooth Sensitive part of tooth Crown Visit every 6 months Brushing this to stop bad breath Bottom part of tooth that is inside the gum Dentist Enamel Root Can cause cavities Tongue Cavity Hole in tooth Top half of tooth Do this at least twice a day Nerve Brush