“…searched pre-oral cancer lesion prevention keywords from 2005 to 2015 and clinical trials from January 2011 to 2015. The authors referred to the less significant patterns between pre-oral cancer lesions and early diagnosis ( Lopez-Lopez, Omana-Cepeda and Jane-Salas, 2015 ). However, some oral conditions might present before oral cancer, such as erythroplakia, leukoplakia, lichen planus, and submucosal fibrosis ( Abati, Bramati, Bondi, Lissoni and Trimarchi, 2020 ).…”