Dentin
dentin
enamel i think
plaque
base
dentin
Enamel of the tooth.
Flouride
It is called the enamel. It's the most external layer of a tooth and the hardest substance in the body.
The main substance in limestone is calcium carbonate.
A substance know as pulp and nerves
Cementum
enamel
Your wish is our command-tooth enamel.