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cemento-enamel junction


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(CEJ)

The line at which the enamel of the tooth crown meets the cementum of the tooth root. The area above this line constitutes the anatomical crown of the tooth. In about 60% of teeth the cementum overlaps the enamel, in about 30% of teeth the cementum and enamel meet exactly and in about 10% of teeth the cementum and enamel fail to meet, leaving an area of exposed dentine. In health, the junctional epithelium is attached to the tooth surface in the region of the CEJ.

Subjects: Dentistry.


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