Yang, Shuangyan
Hu, Lihua
Wang, Chunling
Wei, Fulan
Article History
Received: 30 December 2019
Accepted: 25 February 2020
First Online: 2 March 2020
Compliance with ethical standards
:
: The authors declare no conflict of interest.
: hPDLSCs were obtained from premolar teeth extracted from young men (11–16 years old) for orthodontic reasons whose parents gave informed consent and were approved by the Ethics Committee of School and Hospital of Stomatology, Shandong University for the study.