[Successful endodontic treatment of dens in dente]

The dens in dente is a developmental variation which is thought to arise as a result of an invagination in the surface of a tooth crown before calcification has occurred. This report is a case which documents the successful non surgical endodontic treatment permanent tooth with dens in dente by periodical dressing the intracanal space with calcium hydroxide for a year and follow up after permanent filling-for one and a half years. After a sign of repair around the periapical area had occurred, the canal was filled with warm gutta percha technique. The importance of early and corrected diagnosis, the possible significance of even a small and noncarious dens in dente, and the treatment of anomaly were emphasized.