Zhang, Rui
Qi, Jianyan
Gong, Min
liu, Qian
Zhou, Hongyan
Wang, Jue
Mei, Yufeng
Article History
Received: 12 July 2021
Accepted: 25 October 2021
First Online: 12 November 2021
Declarations
:
: Ethical approval was obtained from Ethics Committee of The Affiliated Stomatological Hospital of Nanjing Medical University (Approval No. PJ2021-004-01). This study was conducted in full accordance with the Declaration of Helsinki of the World Medical Association. All participants received dental treatment at the Hospital of Stomatology of Nanjing Medical University and provided written informed consent. The written consents were obtained from the parents of the teenagers who were under 8 years of age.
: Not applicable.
: The authors declare that they have no competing interests.