In the event that this manuscript is published in the Journal of the Korean Society of Dental Hygiene, the author(s) hereby transfer(s) the related copyright of this manuscript to the Korean Society of Dental Hygiene.


 The author(s) shall possess all the rights other than copyright, in other words, the right to use a part or the entirety of this manuscript in pursuing patents or creating a manuscript in the future. This means that if any person, including the authors, wishes to use the contents of this manuscript, they should cite the source and could use the relevant contents for educational and research purposes according to CC-BY-NC (https://creativecommons.org/licenses/by-nc/4.0/). All authors of this manuscript have made significant contributions to this manuscript and share a common responsibility for its contents. In addition, the author(s) confirm(s) that this manuscript has never been published previously, and at present, has not been submitted to other academic journals, which the author(s) do not plan(s) to do in the future either.


 This agreement requires that the signatures of all the authors follow the same order as the one that figures in the author list in the manuscript.


Conflict of Interest Disclosure Statement

 The authors disclose financial and personal conflicts of interest related to this research.