Japanese Journal of Oral and Maxillofacial Surgery
Online ISSN : 2186-1579
Print ISSN : 0021-5163
ISSN-L : 0021-5163
Volume 58, Issue 8
Displaying 1-7 of 7 articles from this issue
Preface
Invited review articles
  • Yoshinori YAMAGUCHI
    2012 Volume 58 Issue 8 Pages 462-472
    Published: August 20, 2012
    Released on J-STAGE: November 14, 2014
    JOURNAL FREE ACCESS
    The use of Subcondylotomy procedure, the origin of Intraoral vertical osteotomy (IVRO), has been limited by concerns of potential complications. These concern include condylar position and poor bone contact. Herbert and Nickerson modified the condylotomy procedure by converting it to variation of the IVRO and utilized maxillo-mandibular fixation and rehabilitation to minimize complication. Subsequent reports have confirmed that the IVRO also relieves pain and dysfunction a high percentage of time and, in addition, markedly reduces the complication. Today, IVRO has been using for the correction of Dentofacial Deformity in the world. Because of the primary advantage of this technique compared to the sagittal split osteotomy is the much less frequent and less severe damage to the mandibular nerve. However the protective surgical management was not performed, the potential for bleeding with a vertical oblique osteotomy has been reported to be greater than with the SSRO, because the superior aspect of the osteotomy is carried into the sigmoid notch. I will introduce the safety and ensuring technique of IVRO for correction of dentofacial deformity.
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  • Masahiro NAKAJIMA
    2012 Volume 58 Issue 8 Pages 473-479
    Published: August 20, 2012
    Released on J-STAGE: November 14, 2014
    JOURNAL FREE ACCESS
    Othognathic surgery for jaw deformities are most frequently performed in Japan. Regarding those procedures, Le Fort I osteotomy and anterior maxillary alveolar osteotomy in the maxilla, and sagittal split ramus osteotomy, intraoral vertical ramus osteotomy, anterior mandibular alveolar osteotomy, and genioplasty in the mandibule are selected singly or combined based on cases. Among these orthgnathic surgeries, Le Fort I osteotomy is a typical surgical procedure, as well as sagittal split ramus osteotomy. Although the designing of osteotomy lines in Le Fort I osteotomy is simple, this surgical procedure is apt to be regarded as difficult, due to other risk factors in comparison with mandibular osteotomy, such as difficulty in the repositioning of bone segment, complexity of the maxillary bone structure, bleeding, surgical invasion of the nasal cavity and paranasal sinus, and postoperative changes in the nasal base morphology. However, regarding surgical treatment for jaw deformities, Le Fort I osteotomy is considered to be a surgical procedure which we should master, as well as sagittal split ramus osteotomy.
    Basically, orthognathic surgeries involve subperiosteal surgical manipulation, and it is simply summarized that Le Fort I osteotomy should also be carefully performed without injuring the periosteum. In order to achieve this, it is necessary to accumulate experience, sufficiently understanding the basic factors to safely perform Le Fort I osteotomy. This manuscript outlines the major points in the surgical procedure of Le Fort I osteotomy.
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Case reports
  • Hiroyoshi HOSOKAWA, Yukihiro MOMOTA, Kenji FUJISAWA, Koichi KANI, Masa ...
    2012 Volume 58 Issue 8 Pages 480-483
    Published: August 20, 2012
    Released on J-STAGE: November 14, 2014
    JOURNAL FREE ACCESS
    Odontoameloblastoma is a rare odontogenic tumor, in which dentin and enamel are formed. Histologically, odontoameloblastoma is similar to ameloblastoma. We report a case of odontoameloblastoma arising in the maxilla.
    A 12-year-old boy complained of swelling and pain at the incisor region on the left side of the maxilla and visited our department. Computed tomography showed a unilocular radiolucency, in which many calcified bodies were observed around the impacted canine. The clinical diagnosis was an odontogenic tumor, and the lesion was extirpated under general anesthesia. Histopathological examination of the resected specimens showed the presence of hard tissues, enamel, and dentin, accompanied by an enamel organ. Consequently, the tumor was diagnosed to be an odontoameloblastoma. There has been no evidence of recurrence for 3.5 years after the operation.
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  • Yuko MINAMI, Yumiko OHBAYASHI, Fumi SAWAI, Keinoshin WADA, Minoru MIYA ...
    2012 Volume 58 Issue 8 Pages 484-488
    Published: August 20, 2012
    Released on J-STAGE: November 14, 2014
    JOURNAL FREE ACCESS
    We report a case of rheumatoid arthritis associated with bisphosphonate-related osteonecrosis of the jaw (BRONJ) and methotrexate-associated lymphoproliferative disorder (MTX-LPD). A 60-year-old woman had spontaneous pain, swelling, and dehiscence of the right mandibular gingiva after the placement of dental implants. The patient was given MTX, steroids, and bisphosphonates to treat rheumatoid arthritis. BRONJ was diagnosed, and anti-inflammatory therapy was administered. On the day of admission, she had a high fever, pancytopenia, liver dysfunction, and hemostatic disorder. MTX-LPD was diagnosed on the basis of the results of a bone marrow biopsy and symptoms. MTX was withdrawn, and chemotherapy was begun. Three months after the start of chemotherapy, FDG-PET scanning showed uptake of FDG in the liver. The patient died 10 months after initial treatment despite intensive care, including several aggressive courses of chemotherapy.
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  • Satoshi SUMIOKA, Takashi MIMA, Miki ISHIBASHI, Yusuke YOKOTA, Natuko S ...
    2012 Volume 58 Issue 8 Pages 489-493
    Published: August 20, 2012
    Released on J-STAGE: November 14, 2014
    JOURNAL FREE ACCESS
    Desmoplastic ameloblastoma (DA) is an uncommon histological subtype of ameloblastoma characterized by an abundance of densely collagenous desmoplastic stroma with small nests and islands of odontogenic epithelium. DA is a locally aggressive odontogenic tumor that mainly involves the anterior region of the jaw. We report an unusual case of DA arising in the posterior body of the mandible of a 49-year-old man. The tomor was successfully treated by segmental resection and immediate reconstruction with an autologous iliac bone graft.
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  • Hirokazu YUTORI, Noboru AKAZAWA, Ryosuke NISHIO
    2012 Volume 58 Issue 8 Pages 494-498
    Published: August 20, 2012
    Released on J-STAGE: November 14, 2014
    JOURNAL FREE ACCESS
    5-Fluorouracil leukoencephalopathy presents with various types of neuropathy, including disturbed consciousness, psychological symptoms, and motor symptoms. This report presents a case of 5-fluorouracil leukoencephalopathy that occurred during postoperative chemotherapy in a patient with tongue cancer.
    A 21-year-old postoperative patient with tongue cancer received chemotherapy (with 80mg / m2 cisplatin on day 1 and 1000 mg / 5-Fluorouracil on days 1-5).
    5-Fluorouracil was discontinued because psychological symptoms and tonic convulsion began on day 5 of chemotherapy. The patient was given a diagnosis of leukoencephalopathy because brain MRI showed a bilateral, symmetric high-signal-intensity lesion involving the white matter. The patient was observed closely without any therapy and recovered 6 days after the onset of leukoencephalopathy. Leukoencephalopathy can occur during chemotherapy with 5-fluorouracil, and it is important to diagnose this condition at an early stage and immediately discontinue treatment with 5-fluorouracil.
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