[Variations of cemento-enamel junction of human teeth. Literature review].

The paper gives an account of the variations of the cemento-enamel borderline. Till now, the most studies were conducted on ground sections. Only a few descriptions of the relationship between enamel and cementum along the circumferential junction can be find. The authors described 5 variations which were discussed: cementum meets enamel, cementum fails to meet enamel, cementum overlaps enamel, enamel overlaps cementum, undertermined type. These observations show the unpredictable variability of enamel-cementum junction. It should be noted that the relationship is not constant along the circumferential crown root demarcation line.