Eruption of impacted teeth associated with an odontogenic tumor was successfully induced by marsupialization and/or orthodontic treatment in 5 cases. After removal of the tumor, in three cases, orthodontic treatment was carried out, and in two cases, marsupialization was performed for impacted teeth. Though impacted teeth erupted in all cases, eruption of the impacted tooth up to the occlusal plane was measured in a case without orthodontic treatment. As a result of the findings in this study, it was suggested that application of orthodontic treatment for impacted teeth, which were suspected to be lacking the ability of spontaneous eruption due to odontogenic tumors, would be useful for induction of tooth eruption.