歯内歯様の奇形を呈する埋伏過剰歯由来と考えられる含歯性囊胞の1例

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  • A case of dentigerous cyst originating from an impacted supernumerary tooth with a dens in dente deformity

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<p>Dentigerous cysts are relatively common lesions in the maxillomandibular region. However, it is difficult to distinguish them from odontogenic tumors when the lesion involves a malformed tooth. In this report, we describe a rare case of an odontogenic cyst involving a supernumerary tooth with a dens in dente deformity in the mandibular region. The patient was a 15-year-old boy. At the time of his initial examination, there was mild bony swelling on the 7 buccal side. Panoramic radiography showed a cyst-like radiolucent image in the right mandible from the 7 to the middle of the mandibular ramus, and opaque images with internal transparency to its anterior and posterior. The pathological diagnosis via biopsy was cyst-like lesion. The cyst-like lesion and hard tissue lesion were removed under general anesthesia. The cyst-like lesion was relatively thick, and the pathological diagnosis was dentigerous cyst. One of the hard tissues was a supernumerary tooth with a dens in dente deformity, grayish-white in color, and bullet-shaped. This is a valuable case, since dentigerous cysts originating from a supernumerary tooth with a dens in dente deformity in the mandibular wisdom tooth region are rare, and few cases have been reported in Japan.</p>

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