coronal zone

coronal zone
the entire enamel area of the tooth crown above the cementoenamel junction, the demarcation between crown and root. The coronal zone is subdivided horizontally into three areas: the occlusal zone, the contact area zone, and the cervical zone. These divisions are also spoken of as the occlusal third, the middle third, and the cervical third.

Medical dictionary. 2011.

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  • contact area zone — the zone which includes the contact area of adjoining teeth; usually it is in the middle third of the coronal zone between the occlusal and the cervical zones …   Medical dictionary

  • cervical zone — that third of the coronal zone which is nearest the cervix of the tooth, marked by the cementoenamel junction of crown and root …   Medical dictionary

  • occlusal zone — that third of the coronal zone of the teeth which is nearest the occlusal plane …   Medical dictionary

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