There are two types of dental polyps: the first one is gingival polyp, which is mainly due to the presence of large cavities in the mouth for a long time without filling treatment, which may cause the gingival papilla outside the cavity to grow into the cavity. This kind of polyp can be removed by using electric knife or common blade under anesthesia, and then timely filling treatment. The second type of polyp is pulpal polyp, if the patient has a large pulp cavity and thick root canal, after suffering from pulpitis and not receiving treatment, there will be apical area buds growing through the root canal to fill the pulp cavity, and it is necessary to clean out the pulpal polyp completely through root canal treatment. In addition to these two cases, there is also a pulpal polyp. The pulpal polyp proves that we may have a perforation in the pulpal floor and it is recommended to extract the affected tooth in time.