Supernumerary teeth are an uncommon occurrence that have the ability to arise anywhere in the dental arch. Mesiodens is a specific type of supernumerary tooth that occurs in the vicinity of the maxillary central incisors. Mesiodens are the most common among all supernumerary teeth, almost always impacted, and may also be seen in various positions based on the eruption status. The formation of mesiodens is a much-debated topic and many theories have been proposed. The reports also include its common radiographic findings and a pertinent literature review. This study reports a case of an impacted, inverted mesiodens incidentally discovered on a preimplant examination of maxilla. This article demonstrates the scope of eruption of an impacted and inverted mesiodens. Various methods of treatment plan are discussed and a new classification system of mesiodens is proposed. Schlagwörter: cone beam computed tomography, mesiodens, nasal fossa, nasal septum, supernumerary