Dentigerous cysts are a common finding in dogs with unerupted teeth. Careful evaluation of the dentition and radiographic examination of any areas of apparently missing teeth is recommended to identify unerupted teeth. Dentigerous cysts may be small and focal, or they may be expansive and destructive. This case report describes an extensive dentigerous cyst that formed secondary to an unerupted tooth. Although the cyst was not completely excised due to its extensive nature, multiple postoperative examinations showed resolution of the cyst and no radiographic or clinical signs of recurrence.
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