Imaging Sci Dent.  2012 Sep;42(3):197-200. 10.5624/isd.2012.42.3.197.

Unique case of a geminated supernumerary tooth with trifid crown

• Ather A
• Ather H
• Sheth SM
• Muliya VS

• KMID: 2167439
• DOI: http://doi.org/10.5624/isd.2012.42.3.197

Abstract

Gemination, a relatively uncommon dental anomaly, is characterized by its peculiar representation as a tooth with a bifid crown and a common root and root canal. It usually occurs in primary dentition. To come across gemination in a supernumerary tooth is a rare phenomenon. The purpose of this paper is to present a unique case of hyperdontia wherein gemination in an impacted supernumerary tooth resulted in a trifid crown unlike the usual bifid crown. The role of conventional radiographs as well as computed tomography, to accurately determine the morphology and spatial location, and to arrive at a diagnosis, is also emphasized in this paper.

Keyword

Tooth, Supernumerary; Radiography; Tooth, Impacted; Multidetector Computed Tomography

MeSH Terms

Crowns
Dental Pulp Cavity
Dentition, Primary
Multidetector Computed Tomography
Tooth
Tooth, Impacted
Tooth, Supernumerary

Figure

• 

  Fig. 1 A. Intraoral examination shows a decayed maxillary right second premolar and a paramolar palatal to the right maxillary first molar. B. Periapical radiograph shows the presence of a paramolar and a "Y" shaped radiopacity depicting supernumerary crowns with a common root and root canal.

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  Fig. 2 Panoramic radiograph reveals the presence of hyperdontia.

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  Fig. 3 Maxillary occlusal radiograph shows the buccolingual positioning of supernumerary teeth.

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  Fig. 4 A. Axial CT slice through maxilla shows the medially directed molariform crown of the geminated supernumerary tooth. B. Coronal CT slice shows the loss of the cortical plate around the geminated supernumerary tooth in the maxilla.

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  Fig. 5 Three-dimensional reconstructed CT images display the paramolar and geminated supernumerary tooth with trifid crown along with their spatial orientation.

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