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Article History

Received: 3 December 2019

Accepted: 4 February 2021

First Online: 22 February 2021

Ethics approval and consent to participate

: All procedures performed in studies involving human participants were in accordance with the ethical standards of the University of Rome “Tor Vergata”, Rome, Italy, and with the 1964 Helsinki declaration and its later amendments. Informed consent was obtained, at the time of extraction, from all individual participants included in the study, as part of routine documentation. Patients were informed that the extracted teeth could be used for research purposes, and written approval (by signature) was obtained from the patients at this point. Written informed consent was obtained from a parent or guardian for participants under 16 years old.

: Not applicable.

: The authors declare that they have no competing interests.