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Article History

Received: 18 July 2018

Accepted: 24 October 2018

First Online: 11 December 2018

Ethics approval and consent to participate

: Ethical approval was granted by the institutional review board at the Dental Hospital of the Tokyo Medical and Dental University (No. D2015–600).

: Written informed consent was obtained from the patient for publication of this case report and any accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.

: The authors declare that they have no competing interests.

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