ABSTRACT
Objective @#To study and compare the recurrence rate of wisdom tooth pericoronitis and impacted tooth types of Yunnan college ethnic student. @*Methods @# 549 cases of pericoronitis of wisdom tooth from Yunnan college ethnic students were randomly selected by recording clinical symptom, recurrence situations and impacted tooth types by professional dentists, then clinical data was statistical analyzed.@*Results@# Most of pericoronitis (58.65%) was caused by vertical impaction of mandibular wisdom tooth. There was no significant difference (P>0.05) between Han ethnic groups and Minority ethnic groups of impacted tooth types. But there was significant difference (P<0.01) between Han ethnic groups and Minority ethnic groups of pericoronitis of wisdom tooth and recurrence rate.@*Conclusions @#There was higher rate of incidence and recurrence rate of pericoronitis of minority students.