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Region of interest
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Volume rendering of tooth 48
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1. Unilocular benign odontogenic lesion in the posterior fourth quadrant
A well-defined unilocular radiolucent entity with a scalloped corticated periphery is present in the posterior fourth quadrant. This entity has displaced tooth 47 mesiobuccally and has displaced tooth 48 into the superior aspect of the anterior ramus at the base of the coronoid process. No root resorption or damage has occurred to tooth 47. Minimal buccolingual expansion of the alveolar process has occurred. The inferior alveolar nerve canal has been locally displaced buccally and inferiorly. The buccal and lingual cortical plates remain intact adjacent to the entity. This most likely represents a benign odontogenic tumor, such as an odontogenic keratocyst. A biopsy would be necessary in order to confirm the diagnosis.
Buccally displaced tooth 47
Tooth 47 has been buccally displaced by the lesion in the posterior fourth quadrant, and is in linguoversion. The roots of tooth 47 do not exhibit any signs of resorption or damage.
Mesiodistal views of posterior fourth quadrant
These mesiodistal cross-sectional images demonstrate the large unilocular cystic entity that is present in the posterior fourth quadrant, as well as the displacement of tooth 48 into the anterior superior aspect of the ramus. The scalloped inferior border of the radiolucent lesion is evident in these images, as is the extension of the region mesially to the periapical region of tooth 46. This radiographic appearance is suggestive of an odontogenic keratocyst.
Axial views of posterior fourth quadrant
These axial cross-sectional images demonstrate the limited buccolingual expansion of the alveolar process by the radiolucent odontogenic lesion. The entity has marsupialized through the alveolar crest in the pericoronal region of tooth 47.
2. Secondarily affected tooth 46
The radiolucent lesion in the posterior fourth quadrant extends into the periapical region of tooth 46. However, tooth 46 is not the source of the lesion and appears normal radiographically.
Unerupted tooth 18
Tooth 18 is vertically oriented and remains unerupted in the right maxillary tuberosity. The follicle surrounding the crown of the tooth appears normal. Tooth 18 has not had any effect upon tooth 17.