著者

小野寺 慧 松本 直子 熊谷 章子 星 秀樹 杉山 芳樹 及川 大成 石橋 修

出版者

日本口腔診断学会

雑誌

日本口腔診断学会雑誌 (ISSN:09149694)

巻号頁・発行日

vol.28, no.1, pp.26-30, 2015-02-20 (Released:2015-06-03)

参考文献数

16

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Despite the considerable amount of literature on the positioning of ectopic impacted third molars, few reports have described cases of distal movement in the jawbone. In the present study, we describe our experience in treating a patient whose impacted lower third molar migrated over a 12-year period from the distal region of the second molar to a position inferior to the coronoid process.The patient was a 37-year-old man who first visited our facility in April 2012 with a chief complaint of right facial swelling and pain. Radiography revealed complete inverse impaction of the lower right third molar into a position inferior to the coronoid process, with a cyst-like radiolucent area including the crown spreading to the distal region of the lower right second molar.A radiograph from 12 years earlier showed that the lower right third molar was horizontally impacted distal to the lower right second molar. We therefore concluded that this lower right third molar had migrated apically over a 12-year period due to being displaced by the coronal lesion. Histopathological assessment indicated that the lesion was a dentigerous cyst. It is now 1 year since we performed the surgery and the patient has made good progress without any relapse to date.

著者

大平 明範 村田 尚子 星 秀樹 杉山 芳樹 関山 三郎 武田 泰典

出版者

日本小児口腔外科学会

雑誌

小児口腔外科 (ISSN:09175261)

巻号頁・発行日

vol.10, no.1, pp.33-37, 2000-06-30 (Released:2011-08-11)

参考文献数

21

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The patient was an 8-year-old boy, who consulted our department on May 25, 1999, because of a black spot in the maxillary gingiva. He had under-gone application of saforide® in CB_??_ in a dental clinic 5 years previously. Thereafter, he noted a black spot in the surrounding gingiva, but because of no pain, it was left untreated. Recently, the patient consulted a dental clinic due to an increase in the size of the spot. He was then referred to our department. Intraoral examination revealed a flat dark brown spot (11×6mm) in the buccal gingiva around 2_??_, showing infiltration into the surrounding tissue. There was also a localized flat black spot (1×1mm) besides the dark brown spot. Based upon these clinical findings pigmented nevus or malignant melanoma was suspected. As a result of biopsy performed on May 25 using cryosurgery, histopathologically they were diagnosed as cellular blue nevi. On June 25, the spots were removed together with the surrounding gingiva and periosteum. The course has been uneventful these 8 months after the surgery without a sign of recurrence.