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The portion of the tooth that is normally visible above the gum-line is called the crown and the portion below the gum line is called the root . As we move closer to the tip of the crown, we say we are moving coronally and as we move closer to the tip of the root we are moving apically . The crown is covered with a thin coating of non-living, nonporous enamel which is the hardest substance in the body. Underneath the enamel of the crown is a living tissue called dentin .
Wiki User
∙ 14y ago
Wiki User
∙ 13y agopulp cavity
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