Alhajj, Wadhah Abdulnasser
Article History
Received: 22 October 2019
Accepted: 11 March 2020
First Online: 25 March 2020
Ethics approval and consent to participate
: The study was approved from Ethical committee at Thamar University (Faculty of Dentistry) and written informed consents were obtained from patients to participate.
: Not applicable.
: The authors declare that they have no competing interests.