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Region of interest
38 cyst area
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1. Simple bone cyst in left posterior mandible
A well-defined, delicately corticated radiolucency is present within the left posterior mandible, which extends apical to tooth 36 into the inferior aspect of the ramus and from the alveolar crest between teeth 37/38 to the inferior mandibular border. The contiguous buccal and lingual cortical plates are mildly thinned due to the presence of endosteal scalloping, but remain intact. The left mandibular nerve canal courses through this radiolucency, and the cortices of the canal are partially effaced. The contiguous lamina dura of the adjacent teeth remains intact. This radiographic appearance is consistent with a simple bone cyst in the left posterior mandible. Radiographic monitoring of this area for evidence of spontaneous healing is recommended.
Left mandibular nerve buccal to tooth 38
The left mandibular nerve courses buccal to the mesial and distal root apices of the horizontally impacted tooth 38. No significant nerve compression is evident. The residual follicle surrounding the crown of the tooth appears normal. The periodontal ligament space is visible around the root circumference, which suggests this tooth is unlikely to be ankylosed. No resorption is noted on tooth 37.
Axial views of posterior 3rd quadrant
These axial cross-sectional images demonstrate the buccal passage of the left mandibular nerve canal relative to the root apices of tooth 38. Note the absence of resorption on tooth 37.
Mesiodistal views of tooth 38
These mesiodistal cross-sectional images demonstrate the horizontal orientation of tooth 38 relative to the long axis of tooth 37. The residual follicle appears normal. The lamina dura along the mesial root of tooth 38 adjacent to the simple bone cyst remains intact.
Impacted tooth 28
Tooth 28 is distoangularly impacted and the crown is oriented in mild buccoversion. The residual follicle appears normal and no signs of ankylosis are present. No resorption has occurred to tooth 27.