Shimizu, S.
Edama, M. http://orcid.org/0000-0002-2784-6466
Ikezu, M.
Matsuzawa, K.
Kaneko, F.
Kageyama, I.
Article History
Received: 22 October 2019
Accepted: 13 January 2020
First Online: 25 January 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The methods were carried out in accordance with the 1964 Declaration of Helsinki, and the cadavers were legally donated for the study by the Nippon Dental University of Life Dentistry at Niigata in Japan.
: Informed consent was obtained from the families of the cadaver donors.