Study design
We conducted a two-arm parallel randomised controlled clinical trial on twenty patients with oral PG. A convenience sample of patients was recruited from the outpatient clinic of the Department of Oral Medicine, Periodontology, Diagnosis and Oral Radiology, Faculty of Dentistry, Alexandria University, Egypt. The study was conducted during the period between December 2020 and December 2021, after obtaining ethical approval from the Research Ethics Committee of the Faculty of Dentistry, Alexandria University, Egypt (IRB NO:00010556-IORG 0,008,839). This study was registered in the U.S National Institutes of Health Clinical Trials Registry (NCT05099081). It was also performed in accordance with the principles of the modified Helsinki code for human clinical studies, as revised in 2013 [