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This case report discusses the incidental finding of a very unusually positioned supernumerary tooth in a 9-year-old male patient which presented to our oral and maxillofacial department. Along with two other unerupted conical supernumeraries in the anterior maxilla, this supernumerary was uniquely located within the nasopalatine canal extending into the base of the right nasal fossa. The abnormal morphology of this supernumerary was consistent with the presentation of a compound odontoma.
CPD/Clinical Relevance: This report highlights the value of three-dimensional imaging in managing such cases, surgical approaches to remove the impacted teeth and evaluates the need for removal of these supernumerary teeth.
Article
A supernumerary tooth is defined as an additional tooth to the normal dentition. The prevalence of supernumerary teeth in the permanent dentition is reported to range between 0.1% and 3.8% for the White populations, and between 2.7% and 3.4% for sub-Saharan African and Asian populations.1 They tend to occur more frequently in males compared to females with a ratio of 2:1.1,2 Single supernumerary teeth have been most commonly reported in 76–86% of cases. Multiple supernumerary teeth in an individual have been reported as a pair in 12–23% of cases, and more than two teeth have been reported in less than 1%.3
Supernumeraries may present as an isolated finding, or as part of a syndrome such as cleidocranial dysostosis, cleft lip and/or palate and Gardner's syndrome. They often present among family members; however, it does not follow a Mendelian inheritance pattern. The most widely accepted theory for the aetiology of supernumerary teeth is the localized and independent hyperactivity of the dental lamina.1,2
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