Text and Data Mining valid from 2019-03-29
Received: 6 January 2019
Accepted: 22 February 2019
First Online: 29 March 2019
Ethics approval and consent to participate
: Not applicable. But, for the clinical radiographic pictures included, we have received a statement of ethics approval was provided by the Department of Oral and Maxillofacial Surgery at Seoul National University Dental Hospital, with the approval of the Institutional Review Board of Seoul National University (S-D20170005).
: Written informed consent was obtained from the patients for the publication.
: The author declares that there are no competing interests.
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