Japanese Journal of Oral and Maxillofacial Surgery
Online ISSN : 2186-1579
Print ISSN : 0021-5163
ISSN-L : 0021-5163
Volume 63, Issue 6
Displaying 1-6 of 6 articles from this issue
Preface
Case reports
  • Ayako SUGANO, Hisashi OZAKI, Kazuyuki YUSA, Hideyuki YAMANOUCHI, Hiroh ...
    2017 Volume 63 Issue 6 Pages 294-297
    Published: June 20, 2017
    Released on J-STAGE: August 21, 2017
    JOURNAL FREE ACCESS

    Peripheral odontogenic fibroma (POdF) is a relatively rare benign tumor that originates in the peripheral gingiva. Only a few cases of POdF in infants have been reported. In this paper, we report a case of POdF arising bilaterally in the mandibular gingiva of an infant.

     A 3-year-old boy was referred to our clinic because of a growing mass bilaterally arising in the mandibular gingiva at the distal region of the second deciduous molar. Intraoral examination revealed a bilateral rough and irregularly surfaced gingival mass. An X-ray film showed no destruction of the mandibular bone.

     The clinical diagnosis was a benign gingival tumor, and tumor extirpation was performed with the patient under general anesthesia. The extirpated masses were white and elastic hard tissue.

     Histopathological examination revealed that the tumor was composed mainly of fibroblastic tissue with scattered islands of odontogenic epithelium. The definitive diagnosis was POdF.

     There has been no sign of recurrence as of 2 years after surgery.

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  • Shuichi KORETSUNE, Mizuki OHASHI, Chieko MASUDA, Satoyo FUKUHARA, Tosh ...
    2017 Volume 63 Issue 6 Pages 298-303
    Published: June 20, 2017
    Released on J-STAGE: August 21, 2017
    JOURNAL FREE ACCESS

    Synovial sarcoma, a malignant tumor with a poor prognosis, most commonly occurs near limb joints and has relatively high rates of hematogenous metastases to the lungs and other organs. While synovial sarcoma very rarely arises in the head and neck region, occurrence in sites unrelated to joints, such as the tongue and pharynx, has been reported. We report a rare case of synovial sarcoma on the anterior border of the coronoid process. The patient was a 31-year-old man who was referred to our department because of rightcheek swelling and tenderness. Due to the severity of the pain and swelling, he was hospitalized for biopsy, Because malignancy was pathologically detected on biopsy, wide resection of the soft tissue tumor, including the right mandibular coronoid process, was therefore performed with the patient under general anesthesia. Reconstruction was preformed using a mandibular reconstruction plate and a left radial forearm flap. Synovial sarcoma was definitively diagnosed on histopathological examination of the surgical specimen. Five cycles of doxorubicin/ifosfamide/mesna (AIM) therapy were postoperatively administered in the hematology department. There has been no sign of recurrence or metastasis for 24 months postoperatively.

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  • Akihide NEGISHI, Maiko SHIBASAKI
    2017 Volume 63 Issue 6 Pages 304-309
    Published: June 20, 2017
    Released on J-STAGE: August 21, 2017
    JOURNAL FREE ACCESS

    Opportunities to treat elderly patients with temporomandibular joint (TMJ) dislocation complicated by systemic diseases or dementia have been increasing in recent years. Reduction is often particularly difficult in patients with long-standing TMJ dislocation caused by the soft tissue filling the mandibular fossa.

     The treatment procedure for long-standing TMJ dislocation begins with a noninvasive therapy such as closed reduction or traction therapy with leverage. If noninvasive therapy is unsuccessful, invasive therapy involving open reduction would be performed, and if reduction fails, the mandibular condyle may be resected as a last resort. Condylectomy has often been reported to be performed using an extraoral approach via a preauricular incision. However, in TMJ dislocation, the mandibular condyle is situated further forward, allowing the mouth to be opened sufficiently. This enables resection of the mandibular condyle using an intraoral approach based on sagittal split ramus osteotomy.

     We performed an intraoral condylectomy to treat long-standing bilateral TMJ dislocation in an elderly patient with cerebrovascular disorder because noninvasive reduction such as closed reduction and traction therapy with leverage was ineffective. After surgery, the patient was able to chew and ingest food orally. Intraoral condylectomy is a potential therapeutic option in cases of long-standing TMJ dislocation with maintained occlusal support that cannot be reduced by noninvasive therapy.

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  • Masahiro WATANABE, Tomoko FUJII, Hiroshi INOUE, Kazutaka KIMURA, Masah ...
    2017 Volume 63 Issue 6 Pages 310-315
    Published: June 20, 2017
    Released on J-STAGE: August 21, 2017
    JOURNAL FREE ACCESS

    Desmoplastic fibroma is a benign mesenchymal tumor originating from bone. It grows slowly and is characterized by strong local infiltration and recurrence. We report a case of desmoplastic fibroma arising in the anterior tooth region of mandible that was treated by conservative surgery. The patient was a 20-year old woman. She felt oppressive pain in the anterior tooth region of the mandible in July 2013. Her dentist found a radiolucent lesion in the affected region and referred her to our clinic in August. At presentation a clinical examination revealed bone expansion and oppressive pain from the left central incisor to the first premolars of the mandible. A panoramic x-ray film showed a well-defined unilocular radiolucent region in the affected front mandibular tooth. In September, a biopsy was performed with the patient under local anesthesia. Histopathologically, the mass was diagnosed as a desmoplastic fibroma. In October, the patient expressed her strong desire to undergo conservative surgery, even though it carried an increased risk of recurrence; thus, enucleation and curettage were performed with the patient under general anesthesia. The tumor was easily separated from the surrounding bone. No recurrence has occurred as of 3 years 2 months after the operation.

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  • Rie TASHIMA, Rie TESHIMA, Masahiro OHARA, Keijiro WATANABE, Kaori NOGU ...
    2017 Volume 63 Issue 6 Pages 316-319
    Published: June 20, 2017
    Released on J-STAGE: August 21, 2017
    JOURNAL FREE ACCESS

    An 84-year-old woman visited our department because of a mass in the alveolus of the anterior maxilla. The lesion was pedunculated, measuring 11 × 10 mm, and hard in consistency. A dental radiogram revealed a radiopaque core, which was connected to underlying alveolar bone. Under a clinical diagnosis of fibrous hyperplasia with bone formation, the lesion was excised by cutting its pedicle with a bone chisel, and the underlying bone was smoothed with a bur under local anesthesia. Pathological examination demonstrated the formation of bone, which was covered by cartilage in the submucosal connective tissue, and osteochondroma was diagnosed. There has been no recurrence as of 3 years 4 months after the operation.

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