Pires, C. W.
Lenzi, T. L.
Soares, F. Z. M.
Rocha, R. O.
Article History
Received: 17 July 2017
Accepted: 16 April 2018
First Online: 12 May 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in this study involving human participants (primary human teeth) were in accordance with the ethical standards of the institutional and/or national research committee (Research Ethics Committee—register number: 45105415.9.0000.5346) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The extracted teeth used in this study came from a tooth bank at the Dental School of the Federal University of Santa Maria. Thus, the research subjects were not contacted in person, since the registration of the teeth and their respective donors is carried out by the tooth bank, which respects the principles of autonomy, justice, beneficence, and non-maleficence.