Study on tooth preservation in patients with ameloblastomas arising in the mandible and treated by the dredging method

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  • YAMADA Tamaki
    Department of Oral and Maxillofacial Surgery, Division of Oral Pathobiological Science, Graduate School of Dental Medicine, Hokkaido University Faculty of Dental Medicine
  • OHIRO Yoichi
    Department of Oral and Maxillofacial Surgery, Division of Oral Pathobiological Science, Graduate School of Dental Medicine, Hokkaido University Faculty of Dental Medicine
  • ASHIKAGA Youichi
    Department of Oral and Maxillofacial Surgery, Division of Oral Pathobiological Science, Graduate School of Dental Medicine, Hokkaido University Faculty of Dental Medicine
  • KURIBAYASHI Kazuyo
    Department of Oral and Maxillofacial Surgery, Division of Oral Pathobiological Science, Graduate School of Dental Medicine, Hokkaido University Faculty of Dental Medicine
  • MATSUZAWA Yusuke
    Department of Oral and Maxillofacial Surgery, Division of Oral Pathobiological Science, Graduate School of Dental Medicine, Hokkaido University Faculty of Dental Medicine
  • NAGAMINE Kyosuke
    Department of Oral and Maxillofacial Surgery, Division of Oral Pathobiological Science, Graduate School of Dental Medicine, Hokkaido University Faculty of Dental Medicine
  • TANAKA Soichi
    Department of Oral and Maxillofacial Surgery, Division of Oral Pathobiological Science, Graduate School of Dental Medicine, Hokkaido University Faculty of Dental Medicine
  • KITAMURA Tetsuya
    Department of Oral Pathology and Biology, Division of Oral Pathobiological Science, Graduate School of Dental Medicine, Hokkaido University Faculty of Dental Medicine
  • TEI Kanchu
    Department of Oral and Maxillofacial Surgery, Division of Oral Pathobiological Science, Graduate School of Dental Medicine, Hokkaido University Faculty of Dental Medicine

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Other Title
  • 下顎エナメル上皮腫に対する反復処置法における歯の保存に関する研究
  • カガク エナメル ジョウヒ シュ ニ タイスル ハンプク ショチホウ ニ オケル ハ ノ ホゾン ニ カンスル ケンキュウ

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Abstract

<p>To consider the possibility of tooth preservation in patients with ameloblastomas arising in the mandible and treated by the dredging method, the relation between the recurrence of such tumors and tooth preservation was investigated.</p><p>　Twenty-five primary ameloblastomas arising in the mandible that were treated between January 1983 and December 2010 and followed for more than 5 years were studied retrospectively.</p><p>　Radiographic images indicated that a total of 67 teeth were involved by the tumors or had tooth roots that were included in or came in contact with the tumors in 25 patients. These teeth were divided into an extracted group and a preserved group, and the tumor recurrence rate was compared between the two groups. Of the 23 teeth involved by the tumors, 20 (87%) were extracted and 3 (13%) were preserved. Of the 44 teeth with roots that were included in or came in contact with the tumors, 5 (11.4%) were extracted and 39 (88.6%) were preserved. Overall, 42 (62.7%) of the 67 teeth were preserved. Among the 42 preserved teeth, 39 were left untreated, and 3 underwent apicoectomy. During the follow-up period, recurrence occurred in surrounding region of 3 of the 42 teeth in the non-extracted group (7.1%) and 2 of the 25 teeth (8%) in the extracted group. Of the 3 preserved teeth that showed recurrence in the surrounding area, 2 could be preserved. One preserved tooth underwent hemisection, and the other was left untreated.</p><p>　A close relation between the recurrence of tumors and the preservation of teeth involved in the ameloblastomas arising in the mandible could not be established in this study. It is necessary to study the relation between the tumor and related teeth by computed tomography and histopathological examinations to establish evidence about the possibility of preserving teeth involved by ameloblastomas.</p>

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