My teeth are made of a soft kind of bone, covered with enamel.
I have three kinds of teeth: cutting teeth, tearing teeth, grinding teeth.
A young child has twenty teeth, ten in each jaw.
A grown person has thirty-two teeth, sixteen in each jaw.
6. To preserve my teeth:
I must keep them clean.
I must not scratch the enamel.
I must not eat or drink anything very hot or very cold.
I must not use them for scissors or nut-crackers.
I must not burn them with tobacco or cigars.