Dentigerous cysts are odontogenic cysts that arise by the accumulation of fluid between reduced enamel epithelium and the tooth crown. Typically, they affect impacted teeth, in the majority of cases mandibular third molars and maxillary canines. Occasionally, supernumerary tooth or odontoma are involved.

Odontomas are considered to be hamartomatous malformations rather than true neoplasms. They develop from epithelial and mesenchymal components of the dental apparatus, producing enamel and dentin.

In this article we report a case of dentigerous cyst associated with complex odontoma in a 15-year-old patient.