Lesson 2: Major Sections of a Tooth

Image: The crown and the root of a tooth.

 Each tooth consists of two major sections: the crown and the root. The crown is about 1/3 of the tooth, the root is about 2/3.

The crown is the visible part of the tooth above the gum line.

Dr. Lee to John: "Could you do us a favor and demonstrate with a big smile?"

Those pearly whites are the crowns.

The root is not normally visible in the mouth. In healthy teeth, the root is below the gum line and anchors the tooth to bone. The root canal runs down the tooth’s root and contains pulp.

A “root canal” also refers to a procedure dentists perform to treat diseased pulp in the root canal. The treatment involves removing the diseased root tissue and filling the canal with an inert material.