This type of tumor is called adamantinoma in most textbooks; however, it appears under several other classifications, such as ameloblastoma or adamantoblastoma. The first complete description is usually credited to Folkson (1879). Since then many others have reported cases, but each one pointed out the rarity of the growth, and no one until recently has surveyed the previous reports.
Robinson1 and Thoma,2 who reviewed the literature and probably have written more extensively on this type of tumor from the point of view of pathology than any one else stated that it may be defined as an epithelial tumor, arising from the odontogenic apparatus or from cells with a potentiality of forming tissues of the enamel organ. It never contains enamel and is either solid or cystic. The odontoma, which is the other tumor arising from the odontogenic cells, is made up of two or more tissues and is most often