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