Received: 26 February 2022
Accepted: 1 June 2022
First Online: 9 June 2022
: This study was approved by the Peking University Ethics Committee and Competent Authority (No. PKUSSIRB-202168154). Consent was obtained from all participants in this study. All patients in our hospital will sign informed consent before receiving oral treatment, which includes that the patient's medical records can be used for teaching and research. This study was performed in accordance with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Not applicable.
: The authors declare that they have no competing interests.