MKI67 and Keratocystic odontogenic tumor: Compared to the odontogenic keratocyst samples, the samples from dentigerous cysts, periapical cysts, ameloblastomas, and normal mucosa demonstrated no Ki-67 expression in 33.3%–66.7% of the samples, mild expression in 13.3%–40.0%, moderate expression in 0%–33.3%, and severe expression in none of the samples (P<0.001).