歯内歯様を呈する埋伏過剰歯に生じた含歯性囊胞の1例

• Published in: 日本口腔外科学会雑誌 Vol. 58; no. 10; pp. 568 - 571
• Main Authors: 大西, 正信, 西田, 哲也, 首藤, 敦史, 宇佐美, 悠, 谷池, 直樹, 竹信, 俊彦
• Format: Journal Article
• Language: Japanese
• Published: 社団法人 日本口腔外科学会 20.10.2012
• Subjects: 含歯性囊胞; 埋伏過剰歯; 歯内歯
• ISSN: 0021-5163; 2186-1579
• DOI: 10.5794/jjoms.58.568

We report a case of dentigerous cyst associated with an impacted supernumerary tooth with similarcharacteristics to dens in dente. A 14-year-old girl was referred for further evaluation of a radiolucent lesionin the left side of the mandible. Radiographic examination showed an immature impacted third molar and amonolocular radiolucent lesion including a malformed tooth-like radiopacity. Surgical enucleation was performed under general anesthesia. Histopathological examination showed anodontogenic cyst and two distinct types of hard tissue. The cyst showed features of a dentigerous cyst. One ofthe hard tissues was an immature tooth, corresponding to the third molar. The other hard tissue consisted ofdentin, immature enamel, and enamel organ. Interestingly, this malformed tooth-like hard tissue had an outerlayer of dentin lined by an inner layer of enamel, similar to the characteristics of dens in dente.