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Accessory Mental Foramen Misdiagnosed as Radiolucent Tumour by Conventional Dental Radiography

Open Journal of Radiology 2014年第2期4卷 173-176页

作者： Shoko Gamoh Yui Mori Michiko Nakatsuka Hironori Akiyama Yumiko Ogawa Yasutomo Iwai Shosuke Morita kimishige shimizutani Department of Dentistry Sumitomo Hospital Osaka Japan Second Department of Oral and Maxillofacial Surgery Osaka Dental University Osaka Japan Department of Oral Anatomy Osaka Dental University Osaka Japan Department of Oral Radiology Osaka Dental University Osaka Japan First Department of Oral and Maxillofacial Surgery Osaka Dental University Osaka Japan

The mental foramen is an important landmark for identifying the mental nerve, and the accessory mental foramen is a rare anatomical variation. This article describes the use of computed tomo- graphy (CT) to detect an accessory mental foramen that was initially misdiagnosed as a radiolu- cent tumour in the right premolar region of a 39-year-old woman by panoramic radiography. The case suggests that preoperative CT should be performed to detect any anatomical variations. This knowledge would help in diagnosis, preoperative planning and prevention of intraoperative nerve or vascular injury.

关键词： Accessory Mental Foramen Mandibular Nerve Panoramic Radiography Computed Tomography

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A unique case of a calcifying cystic odontogenic tumor

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Open Journal of Stomatology 2013年第6期3卷 314-317页

作者： Shoko Gamoh Yukako Nakashima Hironori Akiyama kimishige shimizutani Takuro Sanuki Junichiro Kotani Koji Yamada Shosuke Morita Kazuya Tominaga Masahiro Wato Akio Tanaka Department of Anesthesiology Osaka Dental University Osaka Japan Department of Oral and Maxillofacial Surgery Osaka Dental University Osaka Japan Department of Oral Pathology Osaka Dental University Osaka Japan Department of Oral Radiology Osaka Dental University Osaka Japan

The calcifying odontogenic cyst was first reported by Gorlin et al. in 1962. At that time, it was classified as a cyst related to the odontogenic apparatus, although it was later renamed as a calcifying cystic odontogenic tumor by the WHO calcification in 2005 due to its histological complexity, morphological diversity and aggressive proliferation [2]. Here, we describe a case of a calcifying cystic odontogenic tumor in a 4- year-old boy. The lesion was surgically removed, and the histopathological examination revealed it to be a cystic tumor with ghost cells, a stellate reticulum and small amount of dentinoid tissue in the cystic wall.

关键词： Calcifying Cystic Odontogenic Tumor Diagnostic Imaging Computed Tomography

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The effectiveness of local anesthetic and sodium hyaluronate injection for the posterior disc displacement: A case report

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Open Journal of Stomatology 2013年第3期3卷 223-225页

作者： Yui Mori Kenji Kakudo Hideya Haeniwa Motohiro Gotoh Hirohito Kubo Yuichi Ohnishi Masahiro Nakajima Harumi Iwasaki Hironori Akiyama Yoritaka Yotsui kimishige shimizutani Department of Oral Radiology Osaka Dental University Osaka Japan Second Department of Oral and Maxillofacial Surgery Osaka Dental University Osaka Japan

Posterior disc displacement of the temporomandibular joint is rare. We present a unique treatment method and magnetic resonance (MR) images of this condition. The patient was a 43-year-old male with a chief complaint of abnormal occlusion. Regarding the present status, there was no occlusion on the right side. No temporomandibular joint pain, myalgia, or clicking were observed while mouth opening. On MR images, the posterior disc displacement without reduction on the right was observed and it was assumed that occlusal abnormality was due to this condition. We treated him with the following methods. After injection into the superior articular cavity with 2% lidocaine, a sodium hyaluronate preparation was injected followed by intermaxillary traction applied using rubber. The recovery of occlusion was confirmed in follow-up at 5 days after treatment. In the 13th days, the intermaxillary traction was removed. On MR images, the right disc condition was changed to anterior disc displacement with reduction. We consider our treatment methods are effective for this clinical condition.

关键词： Posterior Disc Displacement without Reduction Temporomandibular Joint Local Anesthetic with Sodium Hyaluronate Injection Intermaxillary Traction Magnetic Resonance Imaging.

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