Abstract: Epulis, a kind of inflammatory tumor-like hyperplasia, is the most common non-malignant gingival tumor which tends to occur at the gingival tissue in clinical work. As we all know, there are several different types of epulis, and we also have various classification methods simultaneously. This article discussed about the perfection of the classification methods for this kind of disease, summarized its epidemiology and clinical features based on the methods of classification, and concluded the research about pathogenesis mechanism by orientation, hoping the comprehensive discussion about this disease will provide the new standard and new ideas for clinical treatment and basic researches.

Key words: Epulis, Classification, Pathogenesis mechanism, Epidemiology