Ethics approval and consent to participate
The participants were briefed completely before the study and signed written informed consents. The ethics of this study was approved by two independent bodies: the research committee of the Islamic Azad University (ethics code: IR.IAU.DENTAL.REC.1399.301, date: 07/03/2021) as well as an international organization responsible for examining, approving, and registering randomized clinical trials (IRCT.ir) in accordance with the Helsinki declaration (RCT code: IRCT20210401050804N1, date: 26/04/2021).