No. The material that protects the root surface is called Cementum. Take a look at:
http://advancedental.com.au/adhs/teeth.html
The root of a tooth are covered with cementum which is much softer than enamel.
The crown has dentin covered by enamel, each root has dentin covered by cementum. The inner portion of the dentin of both the crown and the root also covers the pulp cavity of the tooth close to the CEJ.
The part of the tooth that is covered with enamel is the crown.
crown , enamel
Enamel (outer part, hard), dentin (under enamel), pulp (center, where most nerves are), cementum (covers root of tooth)
The section of the tooth where the anatomical crown meets the anatomical root is called the cementoenamel junction (CEJ). This junction marks the transition between the enamel covering the crown and the cementum covering the root.
The main substance of a tooth is dentin, which is a hard tissue that makes up the majority of the tooth structure. It is covered by enamel on the outer layer and connected to the pulp at the center of the tooth.
CEJ is shorthand for "Cemento-Enamel-Junction. This is the point on a tooth that delineates the crown from the root of the tooth.
The structure of the tooth is as follows: cementum, root canal, enamel.
The root of a healthy tooth has an outside surface called cementum.
enamel found only in the crown of the tooth ( the exposed part of the tooth ), dentin found in both the crown and the root of the tooth ( root : the embedded part of the tooth ) and cement which hold the tooth in it's place
It is called the enamel. It's the most external layer of a tooth and the hardest substance in the body.