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