An overview of the dens invaginatus with case examples.

Dens invaginatus is an uncommon dental anomaly in which there is a deepening of the cingulum with infolding of the enamel and dentine. The severity varies, from mild extension into the pulp cavity, to extreme forms in which the invagination extends through the root, resulting in a second opening at or near the apex, and complex morphology. The following cases report on the different management approaches to dens invaginatus and illustrate the difficulties encountered in managing such cases.