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Report of a case"}]}, "item_7_biblio_info_6": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1999-07", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "1", "bibliographicPageEnd": "22", "bibliographicPageStart": "17", "bibliographicVolumeNumber": "29", "bibliographic_titles": [{"bibliographic_title": "\u65b0\u6f5f\u6b6f\u5b66\u4f1a\u96d1\u8a8c"}, {"bibliographic_title": "\u65b0\u6f5f\u6b6f\u5b66\u4f1a\u96d1\u8a8c", "bibliographic_titleLang": "en"}]}]}, "item_7_description_4": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "Osteoradionecrosis is one of the most serious complications after radiotherapy for head and neck neoplasms. Total radiation dose, dental status and anatomic location of tumors have been recognized as risk factors for the occurrence of osteoradionecrosis. Recently, some papers stressed the importance of pre- and postradiation oral care that might be effective in preventing and/or alleviating radiation complications. In this paper, We reported a case of osteoradionecrosis of mandible supposed to be induced and exacerbated by poor oral hygiene and dental infection. A 61-year-old male with an oral cancer (squamous cell carcinoma, T4NOMO) was treated with external irradiation (6MeV lineac total 56Gy) and interstitial irradiation (198Au grain from 60 Gy to 70Gy). Oral care started two years after the termination of radiotherapy but, oral hygiene had maintained inadequately for various reasons. At ten months thereafter, osteoradiomyelitis occurred in the molar region of the left mandible. It was treated with antibiotics but became chronic. Six months later a defect of the mucous membrane and exposure of the bone were noted in the same region where osteoradiomyelitis had developed previously. A CT scan revealed a wide range of osteomyelitis and a massive sequestrum in left mandible. We administered conservative therapy, because surgical intervention was refused by the patient. In this case, teoradionecrosis was thought to be induced and exacerbated by dental infection. Therefore, we feel it should be stressed that effective pre- and postradiation oral care should be provided to prevent and/or to alleviate osteoradionecrosis.", "subitem_description_type": "Abstract"}, {"subitem_description": 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