Depending on the type of luxation, splint therapy results in acceptable outcomes and may be a feasible treatment option.

Dens invaginatus (DI) is IntroductionDens invaginatus (DI) is an anomaly that results in invagination of the enamel organ into the dental papilla before calcification. Most DI teeth exhibit deepening and development of a lingual pit. However, the size and morphology of the invaginated crown varies considerably (1). A thin or incomplete enamel lining cannot prevent bacterial penetration of the pulp, and such penetration can lead to pulp necrosis and apical periodontitis. In addition, infected invaginations can result in necrosis of pulp tissue before the completion of root development, leaving the tooth with an open apex. Apexification has been used to close the open apex of an immature tooth with apical periodontitis. However, apexification of an immature invaginated tooth may be complicated by the irregular shape of the root canal system. The complex anatomy of DI can compromise instrumentation, disinfection, and application of calcium hydroxide and mineral trioxide aggregate (MTA) into the root canal. In some cases, it is not possible to access the invaginated area. In addition, teeth treated with apexification have thin, weak roots, which are susceptible to fracture. Therefore, treatment of an immature invaginated tooth with periapical abscess continues to be a challenge in pediatric dentistry.Regenerative pulp therapy has recently been recommended as an alternative to apexification, and studies have reported the clinical success of regenerative pulp therapy for immature permanent teeth with pulp necrosis (2). Regenerative pulp therapy is a biologically based procedure designed to replace damaged structures, such as dentin and root structures-including the cells of the pulp-dentin complex. In the revascularization protocol, the infected canal is first disinfected by irrigation and application of combined antibiotics. Then, bleeding is induced from the mechanically irritated apex and sealed in the root canal to function as a scaffold for continuous regenerative tissue development (3). This report describes a case of an immature invaginated maxillary canine in an 11-year-old boy, which was treated successfully with regenerative pulp therapy. Case ReportAn 11-year-old boy with unremarkable systemic findings and family history visited our clinic with chief complaints of gingival swelling and pain near the left

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