Imaging Sci Dent.  2016 Mar;46(1):57-62. 10.5624/isd.2016.46.1.57.

Role of cone-beam computed tomography in the evaluation of a paradental cyst related to the fusion of a wisdom tooth with a paramolar: A rare case report

• Ozcan G
• Sekerci AE
• Soylu E
• Nazlim S
• Amuk M
• Avci F

• KMID: 2160159
• DOI: http://doi.org/10.5624/isd.2016.46.1.57

Abstract

Fusion is an abnormality of tooth development defined as the union of two developing dental germs, resulting in a single large dental structure. This irregular tooth morphology is associated with a high predisposition to dental caries and periodontal diseases. As a result of recurring inflammatory periodontal processes, disorders such as periodontal pocket, pericoronitis, and paradental cysts may develop. A rare mandibular anatomic variation is the retromolar canal, which is very significant for surgical procedures. The fusion of a paramolar and mandibular third molar associated with a paradental cyst co-occurring with the presence of a retromolar canal is rare, and the aim of the present study is to describe the evaluation of this anatomical configuration using cone-beam computed tomography.

Keyword

Fused Teeth; Odontogenic Cyst; Cone-Beam Computed Tomography; Tooth, Supernumerary

MeSH Terms

Anatomic Variation
Cone-Beam Computed Tomography*
Dental Caries
Fused Teeth
Molar, Third*
Odontogenic Cysts
Pericoronitis
Periodontal Diseases
Periodontal Pocket
Tooth
Tooth, Supernumerary

Figure

• 

  Fig. 1 An intraoral examination shows an extra cusp on the lingual aspect of the third molar tooth and inflamed gingiva around the abnormal tooth formation. B. A cropped panoramic radiograph exhibits an extra tooth in close association with the mandibular third molar and a sharply delineated radiolucent lesion around the apical area in relation to the same molar.

• 

  Fig. 2 Cone-beam tomographic images of the right mandibular third molar region demonstrate the fusion of a supernumerary molar on the lingual aspect of the third molar on the axial (A and B), coronal (C), and sagittal (D) planes. B-D. A cystic lesion can be identified around the fused teeth (arrows). E. The axial image shows the lesion in relation to the fused teeth. F. The retromolar canal is observed behind the fused teeth in the sagittal view (arrow).

• 

  Fig. 3 The extracted fused teeth. A. Superior aspect of the fused teeth. B. Buccal aspect. C. Lingual aspect. D. inferior aspect.

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  Fig. 4 A. A photomicrograph shows the cystic lining with mixed dense inflammatory infiltrate (hematoxylin and eosin stain, 40×). B. 200× magnification.

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